/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:50:40,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:50:40,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:50:40,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:50:40,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 19:50:40,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:50:40,144 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:50:40,144 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:50:40,144 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:50:40,146 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:50:40,146 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:50:40,146 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:50:40,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:50:40,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:50:40,147 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:50:40,147 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:50:40,147 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:50:40,148 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:50:40,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:50:40,149 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:50:40,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:50:40,149 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:50:40,149 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:50:40,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:50:40,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:50:40,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:50:40,149 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:50:40,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:50:40,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:50:40,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:50:40,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:50:40,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:50:40,417 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:50:40,418 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:50:40,419 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl [2021-06-12 19:50:40,419 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2021-06-12 19:50:40,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:50:40,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:50:40,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:50:40,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:50:40,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:50:40,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:50:40,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:50:40,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:50:40,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:50:40,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... [2021-06-12 19:50:40,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:50:40,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:50:40,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:50:40,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:50:40,506 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:50:40,553 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:50:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:50:40,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:50:40,554 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:50:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:50:40,554 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:50:40,554 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:50:40,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:50:40,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:50:40,555 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:50:40,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:50:40,851 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 19:50:40,852 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 19:50:40,852 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-12 19:50:40,853 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:50:40 BoogieIcfgContainer [2021-06-12 19:50:40,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:50:40,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:50:40,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:50:40,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:50:40,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:50:40" (1/2) ... [2021-06-12 19:50:40,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b37915 and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:50:40, skipping insertion in model container [2021-06-12 19:50:40,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:50:40" (2/2) ... [2021-06-12 19:50:40,858 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2021-06-12 19:50:40,862 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:50:40,862 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:50:40,862 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:50:40,863 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:50:40,883 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:50:40,905 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:50:40,930 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:50:40,930 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:50:40,930 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:50:40,930 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:50:40,931 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:50:40,931 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:50:40,932 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:50:40,932 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:50:40,940 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2021-06-12 19:50:40,947 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:50:40,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:40,954 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:40,955 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:40,959 INFO L82 PathProgramCache]: Analyzing trace with hash -381977242, now seen corresponding path program 1 times [2021-06-12 19:50:40,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:40,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125792021] [2021-06-12 19:50:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:41,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:41,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125792021] [2021-06-12 19:50:41,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125792021] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:41,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:41,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:50:41,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915724539] [2021-06-12 19:50:41,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:50:41,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:41,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:50:41,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:50:41,119 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:41,164 INFO L93 Difference]: Finished difference Result 40 states and 72 transitions. [2021-06-12 19:50:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:50:41,166 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-12 19:50:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:41,171 INFO L225 Difference]: With dead ends: 40 [2021-06-12 19:50:41,172 INFO L226 Difference]: Without dead ends: 37 [2021-06-12 19:50:41,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-06-12 19:50:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-06-12 19:50:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-12 19:50:41,194 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 10 [2021-06-12 19:50:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:41,194 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-12 19:50:41,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-12 19:50:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-12 19:50:41,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:41,195 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:41,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:50:41,195 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:41,196 INFO L82 PathProgramCache]: Analyzing trace with hash -481455702, now seen corresponding path program 2 times [2021-06-12 19:50:41,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:41,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105932739] [2021-06-12 19:50:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:41,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105932739] [2021-06-12 19:50:41,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105932739] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:41,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:41,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:50:41,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367278644] [2021-06-12 19:50:41,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:50:41,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:50:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:50:41,250 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:41,297 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-06-12 19:50:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:50:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-12 19:50:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:41,300 INFO L225 Difference]: With dead ends: 46 [2021-06-12 19:50:41,300 INFO L226 Difference]: Without dead ends: 43 [2021-06-12 19:50:41,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:41,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-12 19:50:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2021-06-12 19:50:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-06-12 19:50:41,317 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 10 [2021-06-12 19:50:41,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:41,318 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-06-12 19:50:41,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,318 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-06-12 19:50:41,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:41,319 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:41,319 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:41,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:50:41,320 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1042522380, now seen corresponding path program 1 times [2021-06-12 19:50:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:41,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501014464] [2021-06-12 19:50:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:41,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:41,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501014464] [2021-06-12 19:50:41,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501014464] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:41,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:41,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:41,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435898807] [2021-06-12 19:50:41,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:41,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:41,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:41,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:41,369 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:41,421 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2021-06-12 19:50:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:41,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:41,422 INFO L225 Difference]: With dead ends: 41 [2021-06-12 19:50:41,422 INFO L226 Difference]: Without dead ends: 36 [2021-06-12 19:50:41,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-12 19:50:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2021-06-12 19:50:41,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2021-06-12 19:50:41,425 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 11 [2021-06-12 19:50:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:41,426 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2021-06-12 19:50:41,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,426 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2021-06-12 19:50:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:41,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:41,426 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:41,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 19:50:41,426 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:41,427 INFO L82 PathProgramCache]: Analyzing trace with hash -707752582, now seen corresponding path program 1 times [2021-06-12 19:50:41,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:41,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625346223] [2021-06-12 19:50:41,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:41,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:41,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625346223] [2021-06-12 19:50:41,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625346223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:41,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832577832] [2021-06-12 19:50:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:41,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:50:41,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:41,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832577832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:41,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:41,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:50:41,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460390260] [2021-06-12 19:50:41,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:50:41,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:50:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:50:41,636 INFO L87 Difference]: Start difference. First operand 27 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:41,692 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2021-06-12 19:50:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:41,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:41,695 INFO L225 Difference]: With dead ends: 39 [2021-06-12 19:50:41,695 INFO L226 Difference]: Without dead ends: 39 [2021-06-12 19:50:41,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-12 19:50:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-06-12 19:50:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 53 transitions. [2021-06-12 19:50:41,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 53 transitions. Word has length 11 [2021-06-12 19:50:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:41,705 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 53 transitions. [2021-06-12 19:50:41,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2021-06-12 19:50:41,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:41,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:41,706 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:41,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:41,930 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash -742242342, now seen corresponding path program 2 times [2021-06-12 19:50:41,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:41,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260824565] [2021-06-12 19:50:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:41,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:41,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260824565] [2021-06-12 19:50:41,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260824565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:41,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294540644] [2021-06-12 19:50:41,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:42,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:42,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:42,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:50:42,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:42,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294540644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:42,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:42,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:50:42,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309581912] [2021-06-12 19:50:42,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:50:42,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:42,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:50:42,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:42,090 INFO L87 Difference]: Start difference. First operand 28 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:42,132 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2021-06-12 19:50:42,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:42,134 INFO L225 Difference]: With dead ends: 52 [2021-06-12 19:50:42,134 INFO L226 Difference]: Without dead ends: 52 [2021-06-12 19:50:42,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-12 19:50:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-06-12 19:50:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 60 transitions. [2021-06-12 19:50:42,143 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 60 transitions. Word has length 11 [2021-06-12 19:50:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:42,144 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 60 transitions. [2021-06-12 19:50:42,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,144 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 60 transitions. [2021-06-12 19:50:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:42,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:42,145 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:42,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:42,353 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash 59373886, now seen corresponding path program 2 times [2021-06-12 19:50:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:42,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919919173] [2021-06-12 19:50:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:42,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:42,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919919173] [2021-06-12 19:50:42,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919919173] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:42,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:42,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:42,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713273263] [2021-06-12 19:50:42,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:42,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:42,385 INFO L87 Difference]: Start difference. First operand 30 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:42,422 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2021-06-12 19:50:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:42,424 INFO L225 Difference]: With dead ends: 42 [2021-06-12 19:50:42,424 INFO L226 Difference]: Without dead ends: 41 [2021-06-12 19:50:42,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:42,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-06-12 19:50:42,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-06-12 19:50:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2021-06-12 19:50:42,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 11 [2021-06-12 19:50:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:42,427 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2021-06-12 19:50:42,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2021-06-12 19:50:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:42,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:42,427 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:42,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 19:50:42,427 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash 865278844, now seen corresponding path program 3 times [2021-06-12 19:50:42,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:42,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828157116] [2021-06-12 19:50:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:42,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:42,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828157116] [2021-06-12 19:50:42,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828157116] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:42,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:42,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:42,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309598515] [2021-06-12 19:50:42,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:42,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:42,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:42,456 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:42,491 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2021-06-12 19:50:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:42,492 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:42,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:42,492 INFO L225 Difference]: With dead ends: 46 [2021-06-12 19:50:42,492 INFO L226 Difference]: Without dead ends: 44 [2021-06-12 19:50:42,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:42,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-12 19:50:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-06-12 19:50:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2021-06-12 19:50:42,495 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 11 [2021-06-12 19:50:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:42,495 INFO L482 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2021-06-12 19:50:42,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2021-06-12 19:50:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:42,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:42,495 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:42,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 19:50:42,495 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:42,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1777717592, now seen corresponding path program 3 times [2021-06-12 19:50:42,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:42,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930284872] [2021-06-12 19:50:42,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:42,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:42,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930284872] [2021-06-12 19:50:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930284872] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:42,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:42,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:42,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802268769] [2021-06-12 19:50:42,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:42,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:42,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:42,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:42,526 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:42,572 INFO L93 Difference]: Finished difference Result 38 states and 73 transitions. [2021-06-12 19:50:42,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:42,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:42,573 INFO L225 Difference]: With dead ends: 38 [2021-06-12 19:50:42,573 INFO L226 Difference]: Without dead ends: 38 [2021-06-12 19:50:42,574 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-12 19:50:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-06-12 19:50:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2021-06-12 19:50:42,576 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 11 [2021-06-12 19:50:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:42,576 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2021-06-12 19:50:42,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2021-06-12 19:50:42,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:42,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:42,576 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:42,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 19:50:42,577 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:42,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:42,577 INFO L82 PathProgramCache]: Analyzing trace with hash 617529826, now seen corresponding path program 4 times [2021-06-12 19:50:42,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:42,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512051590] [2021-06-12 19:50:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:42,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:42,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512051590] [2021-06-12 19:50:42,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512051590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:42,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19248129] [2021-06-12 19:50:42,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:42,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:50:42,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:42,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19248129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:42,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:42,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:50:42,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231854063] [2021-06-12 19:50:42,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:50:42,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:50:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:50:42,720 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:42,768 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2021-06-12 19:50:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:42,768 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:42,769 INFO L225 Difference]: With dead ends: 42 [2021-06-12 19:50:42,770 INFO L226 Difference]: Without dead ends: 42 [2021-06-12 19:50:42,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:42,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-12 19:50:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-06-12 19:50:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2021-06-12 19:50:42,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 11 [2021-06-12 19:50:42,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:42,780 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2021-06-12 19:50:42,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2021-06-12 19:50:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:42,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:42,783 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:42,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:42,989 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:42,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:42,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2019919942, now seen corresponding path program 4 times [2021-06-12 19:50:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:42,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293082914] [2021-06-12 19:50:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:43,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:43,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293082914] [2021-06-12 19:50:43,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293082914] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:43,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:43,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:43,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188780499] [2021-06-12 19:50:43,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:43,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:43,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:43,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:43,026 INFO L87 Difference]: Start difference. First operand 29 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:43,073 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2021-06-12 19:50:43,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:43,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:43,077 INFO L225 Difference]: With dead ends: 41 [2021-06-12 19:50:43,077 INFO L226 Difference]: Without dead ends: 39 [2021-06-12 19:50:43,077 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-12 19:50:43,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2021-06-12 19:50:43,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-06-12 19:50:43,080 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-06-12 19:50:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:43,080 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-06-12 19:50:43,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-06-12 19:50:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:43,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:43,081 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:43,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 19:50:43,081 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:43,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1491865152, now seen corresponding path program 5 times [2021-06-12 19:50:43,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:43,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410072608] [2021-06-12 19:50:43,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:43,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:43,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410072608] [2021-06-12 19:50:43,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410072608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:43,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786606395] [2021-06-12 19:50:43,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:43,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:43,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 19:50:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:43,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786606395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:43,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:43,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-12 19:50:43,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779777369] [2021-06-12 19:50:43,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:50:43,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:43,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:50:43,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:43,221 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:43,270 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2021-06-12 19:50:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:43,271 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:43,271 INFO L225 Difference]: With dead ends: 44 [2021-06-12 19:50:43,271 INFO L226 Difference]: Without dead ends: 44 [2021-06-12 19:50:43,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:50:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-12 19:50:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-06-12 19:50:43,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2021-06-12 19:50:43,275 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2021-06-12 19:50:43,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:43,275 INFO L482 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2021-06-12 19:50:43,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2021-06-12 19:50:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:43,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:43,276 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:43,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:43,492 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:43,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2001485916, now seen corresponding path program 5 times [2021-06-12 19:50:43,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:43,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652186569] [2021-06-12 19:50:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:43,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:43,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652186569] [2021-06-12 19:50:43,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652186569] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:43,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:43,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:43,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031105416] [2021-06-12 19:50:43,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:43,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:43,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:43,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:43,532 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:43,562 INFO L93 Difference]: Finished difference Result 41 states and 73 transitions. [2021-06-12 19:50:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:43,564 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:43,565 INFO L225 Difference]: With dead ends: 41 [2021-06-12 19:50:43,565 INFO L226 Difference]: Without dead ends: 40 [2021-06-12 19:50:43,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-12 19:50:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2021-06-12 19:50:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2021-06-12 19:50:43,566 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 11 [2021-06-12 19:50:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:43,566 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2021-06-12 19:50:43,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2021-06-12 19:50:43,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:43,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:43,567 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:43,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-12 19:50:43,567 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:43,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1195580958, now seen corresponding path program 6 times [2021-06-12 19:50:43,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:43,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859687805] [2021-06-12 19:50:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:43,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:43,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:43,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859687805] [2021-06-12 19:50:43,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859687805] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:43,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:43,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:43,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974993601] [2021-06-12 19:50:43,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:43,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:43,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:43,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:43,600 INFO L87 Difference]: Start difference. First operand 31 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:43,635 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2021-06-12 19:50:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:43,635 INFO L225 Difference]: With dead ends: 35 [2021-06-12 19:50:43,635 INFO L226 Difference]: Without dead ends: 33 [2021-06-12 19:50:43,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-06-12 19:50:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-06-12 19:50:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2021-06-12 19:50:43,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 11 [2021-06-12 19:50:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:43,637 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2021-06-12 19:50:43,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2021-06-12 19:50:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:50:43,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:43,638 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:43,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 19:50:43,638 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:43,638 INFO L82 PathProgramCache]: Analyzing trace with hash -283142210, now seen corresponding path program 6 times [2021-06-12 19:50:43,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:43,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851197101] [2021-06-12 19:50:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:43,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:43,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851197101] [2021-06-12 19:50:43,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851197101] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:50:43,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:50:43,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 19:50:43,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620074274] [2021-06-12 19:50:43,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:50:43,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:50:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:50:43,674 INFO L87 Difference]: Start difference. First operand 31 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:43,712 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2021-06-12 19:50:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:50:43,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 19:50:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:43,718 INFO L225 Difference]: With dead ends: 32 [2021-06-12 19:50:43,719 INFO L226 Difference]: Without dead ends: 32 [2021-06-12 19:50:43,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:50:43,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-06-12 19:50:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-06-12 19:50:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-12 19:50:43,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-06-12 19:50:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:43,720 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-12 19:50:43,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-12 19:50:43,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:50:43,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:43,721 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:43,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-12 19:50:43,721 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:43,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:43,721 INFO L82 PathProgramCache]: Analyzing trace with hash -466578568, now seen corresponding path program 1 times [2021-06-12 19:50:43,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:43,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704176372] [2021-06-12 19:50:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:43,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704176372] [2021-06-12 19:50:43,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704176372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362430132] [2021-06-12 19:50:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:44,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:50:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:44,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:44,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:50:44,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:44,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:44,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:44,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:44,398 INFO L628 ElimStorePlain]: treesize reduction 62, result has 44.1 percent of original size [2021-06-12 19:50:44,398 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:44,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:44,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:50:44,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:44,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:50:44,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:44,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:50:44,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:44,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:50:44,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:44,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:125, output treesize:22 [2021-06-12 19:50:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:44,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362430132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:44,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:44,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-06-12 19:50:44,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490366953] [2021-06-12 19:50:44,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:44,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:44,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:44,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:44,455 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:45,066 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2021-06-12 19:50:45,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:50:45,066 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:50:45,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:45,067 INFO L225 Difference]: With dead ends: 61 [2021-06-12 19:50:45,067 INFO L226 Difference]: Without dead ends: 55 [2021-06-12 19:50:45,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 707.9ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:50:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-06-12 19:50:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 37. [2021-06-12 19:50:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2021-06-12 19:50:45,069 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 12 [2021-06-12 19:50:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:45,069 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2021-06-12 19:50:45,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2021-06-12 19:50:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:50:45,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:45,069 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:45,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 19:50:45,270 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:45,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:45,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1514371190, now seen corresponding path program 2 times [2021-06-12 19:50:45,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:45,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898729085] [2021-06-12 19:50:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:45,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:45,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:45,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898729085] [2021-06-12 19:50:45,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898729085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:45,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258810559] [2021-06-12 19:50:45,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:45,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:45,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:45,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:50:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:45,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:45,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:45,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:50:45,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:45,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:45,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:45,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:45,725 INFO L628 ElimStorePlain]: treesize reduction 104, result has 12.6 percent of original size [2021-06-12 19:50:45,725 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:45,725 INFO L518 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2021-06-12 19:50:45,725 INFO L518 ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination [2021-06-12 19:50:45,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:45,732 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:133, output treesize:11 [2021-06-12 19:50:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:45,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258810559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:45,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:45,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-12 19:50:45,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164619924] [2021-06-12 19:50:45,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:45,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:45,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:45,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:45,770 INFO L87 Difference]: Start difference. First operand 37 states and 72 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:46,050 INFO L93 Difference]: Finished difference Result 48 states and 92 transitions. [2021-06-12 19:50:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:46,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:50:46,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:46,051 INFO L225 Difference]: With dead ends: 48 [2021-06-12 19:50:46,051 INFO L226 Difference]: Without dead ends: 45 [2021-06-12 19:50:46,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:50:46,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-12 19:50:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-06-12 19:50:46,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 78 transitions. [2021-06-12 19:50:46,056 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 78 transitions. Word has length 12 [2021-06-12 19:50:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:46,056 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 78 transitions. [2021-06-12 19:50:46,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 78 transitions. [2021-06-12 19:50:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:50:46,058 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:46,058 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:46,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:46,261 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1506640792, now seen corresponding path program 3 times [2021-06-12 19:50:46,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:46,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525515485] [2021-06-12 19:50:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:46,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:46,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525515485] [2021-06-12 19:50:46,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525515485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:46,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931099204] [2021-06-12 19:50:46,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:46,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:50:46,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:46,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:50:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:46,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:46,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:46,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:50:46,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:46,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-12 19:50:46,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:46,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:50:46,624 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:46,676 INFO L628 ElimStorePlain]: treesize reduction 93, result has 44.0 percent of original size [2021-06-12 19:50:46,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:46,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:50:46,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:46,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:50:46,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:46,714 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:201, output treesize:62 [2021-06-12 19:50:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:46,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931099204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:46,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:46,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:46,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514000147] [2021-06-12 19:50:46,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:46,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:46,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:46,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:46,822 INFO L87 Difference]: Start difference. First operand 40 states and 78 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:46,970 INFO L93 Difference]: Finished difference Result 51 states and 98 transitions. [2021-06-12 19:50:46,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:50:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:50:46,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:46,971 INFO L225 Difference]: With dead ends: 51 [2021-06-12 19:50:46,971 INFO L226 Difference]: Without dead ends: 48 [2021-06-12 19:50:46,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:50:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-06-12 19:50:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-06-12 19:50:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 78 transitions. [2021-06-12 19:50:46,973 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 78 transitions. Word has length 12 [2021-06-12 19:50:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:46,973 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 78 transitions. [2021-06-12 19:50:46,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 78 transitions. [2021-06-12 19:50:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:50:46,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:46,974 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:47,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:47,181 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:47,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1983860354, now seen corresponding path program 4 times [2021-06-12 19:50:47,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:47,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078833977] [2021-06-12 19:50:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:47,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:47,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078833977] [2021-06-12 19:50:47,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078833977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:47,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088200377] [2021-06-12 19:50:47,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:47,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:47,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:47,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:50:47,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:47,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:47,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:50:47,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:47,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:47,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:50:47,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:47,628 INFO L628 ElimStorePlain]: treesize reduction 79, result has 12.2 percent of original size [2021-06-12 19:50:47,628 INFO L518 ElimStorePlain]: Eliminatee v_prenex_10 vanished before elimination [2021-06-12 19:50:47,628 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:47,628 INFO L518 ElimStorePlain]: Eliminatee v_prenex_11 vanished before elimination [2021-06-12 19:50:47,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:47,629 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:107, output treesize:11 [2021-06-12 19:50:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:47,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088200377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:47,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:47,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-12 19:50:47,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222490794] [2021-06-12 19:50:47,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:47,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:47,650 INFO L87 Difference]: Start difference. First operand 40 states and 78 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:47,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:47,811 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-06-12 19:50:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:47,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:50:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:47,812 INFO L225 Difference]: With dead ends: 64 [2021-06-12 19:50:47,812 INFO L226 Difference]: Without dead ends: 61 [2021-06-12 19:50:47,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-12 19:50:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-06-12 19:50:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-12 19:50:47,814 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 12 [2021-06-12 19:50:47,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:47,814 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-12 19:50:47,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-12 19:50:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:50:47,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:47,814 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:48,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 19:50:48,017 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:48,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:48,017 INFO L82 PathProgramCache]: Analyzing trace with hash -976515612, now seen corresponding path program 5 times [2021-06-12 19:50:48,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:48,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408772342] [2021-06-12 19:50:48,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:48,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:48,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:48,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408772342] [2021-06-12 19:50:48,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408772342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:48,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695614119] [2021-06-12 19:50:48,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:48,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:48,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:48,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:50:48,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:48,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:48,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:48,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:50:48,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:48,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:48,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-06-12 19:50:48,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:48,512 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.0 percent of original size [2021-06-12 19:50:48,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:48,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:50:48,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:48,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:50:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:50:48,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:48,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:50:48,552 INFO L518 ElimStorePlain]: Eliminatee v_prenex_13 vanished before elimination [2021-06-12 19:50:48,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:48,554 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-06-12 19:50:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:48,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695614119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:48,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:48,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-06-12 19:50:48,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621753321] [2021-06-12 19:50:48,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:48,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:48,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:48,583 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:48,923 INFO L93 Difference]: Finished difference Result 53 states and 102 transitions. [2021-06-12 19:50:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:48,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:50:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:48,924 INFO L225 Difference]: With dead ends: 53 [2021-06-12 19:50:48,924 INFO L226 Difference]: Without dead ends: 50 [2021-06-12 19:50:48,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:50:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-12 19:50:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-06-12 19:50:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-12 19:50:48,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 12 [2021-06-12 19:50:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:48,926 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-12 19:50:48,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-12 19:50:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-12 19:50:48,926 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:48,926 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:49,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:49,127 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash -968785214, now seen corresponding path program 6 times [2021-06-12 19:50:49,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:49,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849983496] [2021-06-12 19:50:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:49,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849983496] [2021-06-12 19:50:49,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849983496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:49,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417670178] [2021-06-12 19:50:49,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:49,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:50:49,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:49,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:50:49,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:49,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:49,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:49,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-12 19:50:49,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:49,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:49,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:49,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:49,544 INFO L628 ElimStorePlain]: treesize reduction 96, result has 13.5 percent of original size [2021-06-12 19:50:49,544 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:49,544 INFO L518 ElimStorePlain]: Eliminatee v_prenex_16 vanished before elimination [2021-06-12 19:50:49,544 INFO L518 ElimStorePlain]: Eliminatee v_prenex_15 vanished before elimination [2021-06-12 19:50:49,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:49,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:125, output treesize:11 [2021-06-12 19:50:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:49,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417670178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:49,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:49,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-12 19:50:49,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850754403] [2021-06-12 19:50:49,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:49,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:49,577 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:49,774 INFO L93 Difference]: Finished difference Result 54 states and 104 transitions. [2021-06-12 19:50:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:50:49,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-12 19:50:49,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:49,775 INFO L225 Difference]: With dead ends: 54 [2021-06-12 19:50:49,775 INFO L226 Difference]: Without dead ends: 51 [2021-06-12 19:50:49,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:50:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-12 19:50:49,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2021-06-12 19:50:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 80 transitions. [2021-06-12 19:50:49,777 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 80 transitions. Word has length 12 [2021-06-12 19:50:49,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:49,777 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 80 transitions. [2021-06-12 19:50:49,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 80 transitions. [2021-06-12 19:50:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:49,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:49,777 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:49,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:49,981 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:49,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:49,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1580118726, now seen corresponding path program 7 times [2021-06-12 19:50:49,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:49,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430362254] [2021-06-12 19:50:49,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:50,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:50,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430362254] [2021-06-12 19:50:50,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430362254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:50,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700482062] [2021-06-12 19:50:50,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:50,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:50,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:50:50,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:50,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:50,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:50,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:50,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:50:50,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:50:50,165 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:50:50,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,189 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-12 19:50:50,189 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:50,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:50:50,190 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 19:50:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700482062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:50,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:50,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:50:50,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558685393] [2021-06-12 19:50:50,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:50,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:50,227 INFO L87 Difference]: Start difference. First operand 41 states and 80 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:50,439 INFO L93 Difference]: Finished difference Result 57 states and 103 transitions. [2021-06-12 19:50:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:50:50,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:50,440 INFO L225 Difference]: With dead ends: 57 [2021-06-12 19:50:50,440 INFO L226 Difference]: Without dead ends: 50 [2021-06-12 19:50:50,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:50:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-12 19:50:50,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2021-06-12 19:50:50,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.0) internal successors, (74), 37 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:50,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 74 transitions. [2021-06-12 19:50:50,441 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 74 transitions. Word has length 13 [2021-06-12 19:50:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:50,441 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 74 transitions. [2021-06-12 19:50:50,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 74 transitions. [2021-06-12 19:50:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:50,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:50,442 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:50,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 19:50:50,648 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:50,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash -4067700, now seen corresponding path program 8 times [2021-06-12 19:50:50,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:50,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031554486] [2021-06-12 19:50:50,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:50,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:50,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031554486] [2021-06-12 19:50:50,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031554486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:50,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678319487] [2021-06-12 19:50:50,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:50,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:50,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:50,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:50,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:50,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:50,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:50,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:50,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,857 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 19:50:50,857 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:50,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:50,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 19:50:50,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:50,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678319487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:50,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:50,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:50:50,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951800517] [2021-06-12 19:50:50,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:50,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:50,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:50,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:50,874 INFO L87 Difference]: Start difference. First operand 38 states and 74 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:50,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:50,961 INFO L93 Difference]: Finished difference Result 56 states and 105 transitions. [2021-06-12 19:50:50,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:50,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:50,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:50,962 INFO L225 Difference]: With dead ends: 56 [2021-06-12 19:50:50,962 INFO L226 Difference]: Without dead ends: 56 [2021-06-12 19:50:50,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:50:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-12 19:50:50,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2021-06-12 19:50:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 77 transitions. [2021-06-12 19:50:50,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 77 transitions. Word has length 13 [2021-06-12 19:50:50,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:50,966 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 77 transitions. [2021-06-12 19:50:50,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:50,966 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 77 transitions. [2021-06-12 19:50:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:50,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:50,968 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:51,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:51,181 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1853476550, now seen corresponding path program 9 times [2021-06-12 19:50:51,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:51,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062283378] [2021-06-12 19:50:51,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:51,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:51,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062283378] [2021-06-12 19:50:51,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062283378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:51,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285137644] [2021-06-12 19:50:51,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:51,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:50:51,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:51,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:51,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:51,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:51,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:51,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:51,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,395 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:51,396 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:51,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:51,396 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:51,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285137644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:51,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:51,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:51,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368622141] [2021-06-12 19:50:51,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:51,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:51,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:51,440 INFO L87 Difference]: Start difference. First operand 39 states and 77 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:51,596 INFO L93 Difference]: Finished difference Result 96 states and 169 transitions. [2021-06-12 19:50:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:50:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:51,597 INFO L225 Difference]: With dead ends: 96 [2021-06-12 19:50:51,597 INFO L226 Difference]: Without dead ends: 96 [2021-06-12 19:50:51,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-12 19:50:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 43. [2021-06-12 19:50:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.1904761904761907) internal successors, (92), 42 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 92 transitions. [2021-06-12 19:50:51,599 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 92 transitions. Word has length 13 [2021-06-12 19:50:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:51,599 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 92 transitions. [2021-06-12 19:50:51,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 92 transitions. [2021-06-12 19:50:51,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:51,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:51,599 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:51,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-12 19:50:51,806 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1051860322, now seen corresponding path program 10 times [2021-06-12 19:50:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:51,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670522967] [2021-06-12 19:50:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:51,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670522967] [2021-06-12 19:50:51,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670522967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:51,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19494173] [2021-06-12 19:50:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:51,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:51,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:51,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:51,954 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:51,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:51,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:51,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:51,995 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:51,995 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:51,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:51,996 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:52,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19494173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:52,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:52,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:52,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331890801] [2021-06-12 19:50:52,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:52,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:52,070 INFO L87 Difference]: Start difference. First operand 43 states and 92 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:52,593 INFO L93 Difference]: Finished difference Result 89 states and 163 transitions. [2021-06-12 19:50:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:50:52,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:52,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:52,594 INFO L225 Difference]: With dead ends: 89 [2021-06-12 19:50:52,594 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 19:50:52,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 553.8ms TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:50:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 19:50:52,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2021-06-12 19:50:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.1363636363636362) internal successors, (94), 44 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 94 transitions. [2021-06-12 19:50:52,596 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 94 transitions. Word has length 13 [2021-06-12 19:50:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:52,596 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 94 transitions. [2021-06-12 19:50:52,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 94 transitions. [2021-06-12 19:50:52,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:52,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:52,596 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:52,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:52,812 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash 666483384, now seen corresponding path program 11 times [2021-06-12 19:50:52,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:52,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703525884] [2021-06-12 19:50:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:52,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:52,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703525884] [2021-06-12 19:50:52,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703525884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:52,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332679598] [2021-06-12 19:50:52,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:52,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:50:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:52,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:53,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:53,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:53,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:53,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:53,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:53,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:53,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:53,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:53,048 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:53,048 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:53,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:53,049 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:53,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:53,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332679598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:53,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:53,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:53,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344559991] [2021-06-12 19:50:53,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:53,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:53,103 INFO L87 Difference]: Start difference. First operand 45 states and 94 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:53,350 INFO L93 Difference]: Finished difference Result 83 states and 156 transitions. [2021-06-12 19:50:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:50:53,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:53,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:53,351 INFO L225 Difference]: With dead ends: 83 [2021-06-12 19:50:53,351 INFO L226 Difference]: Without dead ends: 83 [2021-06-12 19:50:53,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:50:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-12 19:50:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2021-06-12 19:50:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 89 transitions. [2021-06-12 19:50:53,352 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 89 transitions. Word has length 13 [2021-06-12 19:50:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:53,353 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 89 transitions. [2021-06-12 19:50:53,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 89 transitions. [2021-06-12 19:50:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:53,353 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:53,353 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:53,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 19:50:53,569 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:53,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:53,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1044129924, now seen corresponding path program 12 times [2021-06-12 19:50:53,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:53,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244797412] [2021-06-12 19:50:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:53,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244797412] [2021-06-12 19:50:53,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244797412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128083190] [2021-06-12 19:50:53,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:53,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:50:53,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:53,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:53,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:53,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:53,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:53,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:53,786 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:50:53,786 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:53,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:53,787 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:50:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:53,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128083190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:53,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:53,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:53,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759168137] [2021-06-12 19:50:53,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:53,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:53,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:53,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:53,808 INFO L87 Difference]: Start difference. First operand 44 states and 89 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:53,865 INFO L93 Difference]: Finished difference Result 67 states and 130 transitions. [2021-06-12 19:50:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:53,865 INFO L225 Difference]: With dead ends: 67 [2021-06-12 19:50:53,865 INFO L226 Difference]: Without dead ends: 67 [2021-06-12 19:50:53,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-12 19:50:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2021-06-12 19:50:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.0697674418604652) internal successors, (89), 43 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 89 transitions. [2021-06-12 19:50:53,867 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 89 transitions. Word has length 13 [2021-06-12 19:50:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:53,867 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 89 transitions. [2021-06-12 19:50:53,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 89 transitions. [2021-06-12 19:50:53,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:53,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:53,867 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:54,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:54,068 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1239139006, now seen corresponding path program 13 times [2021-06-12 19:50:54,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:54,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092241039] [2021-06-12 19:50:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092241039] [2021-06-12 19:50:54,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092241039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93975244] [2021-06-12 19:50:54,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:54,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:54,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:54,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:54,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:54,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:54,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,242 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:50:54,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:54,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:50:54,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93975244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:54,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:54,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898176680] [2021-06-12 19:50:54,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:54,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:54,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:54,272 INFO L87 Difference]: Start difference. First operand 44 states and 89 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:54,358 INFO L93 Difference]: Finished difference Result 77 states and 149 transitions. [2021-06-12 19:50:54,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:50:54,358 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:54,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:54,358 INFO L225 Difference]: With dead ends: 77 [2021-06-12 19:50:54,359 INFO L226 Difference]: Without dead ends: 77 [2021-06-12 19:50:54,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:54,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-12 19:50:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2021-06-12 19:50:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 111 transitions. [2021-06-12 19:50:54,360 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 111 transitions. Word has length 13 [2021-06-12 19:50:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,360 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 111 transitions. [2021-06-12 19:50:54,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 111 transitions. [2021-06-12 19:50:54,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:54,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,361 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:54,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 19:50:54,567 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash 319438298, now seen corresponding path program 14 times [2021-06-12 19:50:54,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:54,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231785166] [2021-06-12 19:50:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:54,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:54,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231785166] [2021-06-12 19:50:54,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231785166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562358749] [2021-06-12 19:50:54,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:54,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:54,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:54,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:54,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:54,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:50:54,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:50:54,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:54,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:54,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:50:54,717 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:50:54,720 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:54,744 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:50:54,745 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:54,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:50:54,745 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:50:54,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:54,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562358749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:54,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:54,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:54,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286659565] [2021-06-12 19:50:54,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:54,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:54,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:54,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:54,780 INFO L87 Difference]: Start difference. First operand 51 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:54,976 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2021-06-12 19:50:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:50:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:54,977 INFO L225 Difference]: With dead ends: 70 [2021-06-12 19:50:54,977 INFO L226 Difference]: Without dead ends: 68 [2021-06-12 19:50:54,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:50:54,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-12 19:50:54,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2021-06-12 19:50:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.196078431372549) internal successors, (112), 51 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 112 transitions. [2021-06-12 19:50:54,979 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 112 transitions. Word has length 13 [2021-06-12 19:50:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:54,979 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 112 transitions. [2021-06-12 19:50:54,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:54,979 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 112 transitions. [2021-06-12 19:50:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:54,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:54,979 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:55,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-12 19:50:55,193 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1246869404, now seen corresponding path program 15 times [2021-06-12 19:50:55,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:55,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711552436] [2021-06-12 19:50:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:55,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:55,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711552436] [2021-06-12 19:50:55,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711552436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:55,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377214168] [2021-06-12 19:50:55,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:55,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:50:55,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:55,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:55,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:55,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:55,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:55,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,397 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:55,397 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:55,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:55,398 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:55,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377214168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:55,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:55,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:55,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257230997] [2021-06-12 19:50:55,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:55,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:55,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:55,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:55,443 INFO L87 Difference]: Start difference. First operand 52 states and 112 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:55,584 INFO L93 Difference]: Finished difference Result 90 states and 163 transitions. [2021-06-12 19:50:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:50:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:55,585 INFO L225 Difference]: With dead ends: 90 [2021-06-12 19:50:55,585 INFO L226 Difference]: Without dead ends: 90 [2021-06-12 19:50:55,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-12 19:50:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2021-06-12 19:50:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.16) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 108 transitions. [2021-06-12 19:50:55,586 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 108 transitions. Word has length 13 [2021-06-12 19:50:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:55,587 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 108 transitions. [2021-06-12 19:50:55,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 108 transitions. [2021-06-12 19:50:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:55,587 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:55,587 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:55,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:55,803 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:55,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2048485632, now seen corresponding path program 16 times [2021-06-12 19:50:55,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:55,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583171584] [2021-06-12 19:50:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:55,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:55,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583171584] [2021-06-12 19:50:55,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583171584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:55,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020433037] [2021-06-12 19:50:55,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:55,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:55,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:55,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:55,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:55,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:55,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:55,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:55,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:55,962 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:55,994 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:55,994 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:55,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:55,995 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:56,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020433037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:56,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:56,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:56,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533614252] [2021-06-12 19:50:56,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:56,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:56,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:56,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:56,056 INFO L87 Difference]: Start difference. First operand 51 states and 108 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:56,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:56,261 INFO L93 Difference]: Finished difference Result 82 states and 154 transitions. [2021-06-12 19:50:56,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:50:56,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:56,262 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:50:56,262 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 19:50:56,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 237.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:50:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 19:50:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2021-06-12 19:50:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.156862745098039) internal successors, (110), 51 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 110 transitions. [2021-06-12 19:50:56,268 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 110 transitions. Word has length 13 [2021-06-12 19:50:56,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:56,268 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 110 transitions. [2021-06-12 19:50:56,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:56,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 110 transitions. [2021-06-12 19:50:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:56,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:56,268 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:56,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 19:50:56,478 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash -528137958, now seen corresponding path program 17 times [2021-06-12 19:50:56,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:56,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158956967] [2021-06-12 19:50:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:56,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:56,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158956967] [2021-06-12 19:50:56,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158956967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:56,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110735732] [2021-06-12 19:50:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:56,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:50:56,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:56,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:56,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:56,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:56,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:56,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:56,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:56,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:56,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:56,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:56,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:56,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:56,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:56,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:56,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:56,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:56,651 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:56,687 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:56,687 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:56,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:56,688 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:56,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110735732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:56,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:56,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328528472] [2021-06-12 19:50:56,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:56,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:56,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:56,749 INFO L87 Difference]: Start difference. First operand 52 states and 110 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:56,893 INFO L93 Difference]: Finished difference Result 75 states and 148 transitions. [2021-06-12 19:50:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:50:56,893 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:56,893 INFO L225 Difference]: With dead ends: 75 [2021-06-12 19:50:56,893 INFO L226 Difference]: Without dead ends: 75 [2021-06-12 19:50:56,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-12 19:50:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2021-06-12 19:50:56,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 49 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2021-06-12 19:50:56,897 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 13 [2021-06-12 19:50:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:56,897 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2021-06-12 19:50:56,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:56,897 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2021-06-12 19:50:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:56,897 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:56,897 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:57,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 19:50:57,105 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:57,105 INFO L82 PathProgramCache]: Analyzing trace with hash -242535592, now seen corresponding path program 18 times [2021-06-12 19:50:57,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:57,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001434164] [2021-06-12 19:50:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:57,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001434164] [2021-06-12 19:50:57,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001434164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:57,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611470337] [2021-06-12 19:50:57,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:57,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:50:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:57,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:57,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:57,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:57,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:57,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,290 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:57,290 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:57,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:57,291 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:57,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611470337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:57,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:57,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:57,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3488430] [2021-06-12 19:50:57,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:57,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:57,341 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:57,476 INFO L93 Difference]: Finished difference Result 97 states and 180 transitions. [2021-06-12 19:50:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:50:57,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:57,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:57,477 INFO L225 Difference]: With dead ends: 97 [2021-06-12 19:50:57,477 INFO L226 Difference]: Without dead ends: 97 [2021-06-12 19:50:57,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:50:57,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-12 19:50:57,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2021-06-12 19:50:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 117 transitions. [2021-06-12 19:50:57,479 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 117 transitions. Word has length 13 [2021-06-12 19:50:57,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:57,479 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 117 transitions. [2021-06-12 19:50:57,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 117 transitions. [2021-06-12 19:50:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:57,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:57,479 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:57,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:57,680 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash 559080636, now seen corresponding path program 19 times [2021-06-12 19:50:57,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:57,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958812066] [2021-06-12 19:50:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:57,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:57,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958812066] [2021-06-12 19:50:57,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958812066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:57,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623227348] [2021-06-12 19:50:57,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:57,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:57,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:57,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:57,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:57,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:57,843 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:57,846 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:57,879 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:57,879 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:57,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:57,880 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:57,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623227348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:57,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:57,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:57,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466880454] [2021-06-12 19:50:57,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:57,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:57,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:57,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:57,956 INFO L87 Difference]: Start difference. First operand 54 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:58,278 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2021-06-12 19:50:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:50:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:58,278 INFO L225 Difference]: With dead ends: 91 [2021-06-12 19:50:58,279 INFO L226 Difference]: Without dead ends: 86 [2021-06-12 19:50:58,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 356.8ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:50:58,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-12 19:50:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 55. [2021-06-12 19:50:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.185185185185185) internal successors, (118), 54 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 118 transitions. [2021-06-12 19:50:58,280 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 118 transitions. Word has length 13 [2021-06-12 19:50:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:58,280 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 118 transitions. [2021-06-12 19:50:58,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 118 transitions. [2021-06-12 19:50:58,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:58,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:58,281 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:58,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 19:50:58,481 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2017542954, now seen corresponding path program 20 times [2021-06-12 19:50:58,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:58,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060474671] [2021-06-12 19:50:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:58,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:58,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:58,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060474671] [2021-06-12 19:50:58,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060474671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:58,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997149557] [2021-06-12 19:50:58,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:58,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:50:58,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:58,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:58,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:58,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:58,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:50:58,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:58,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:58,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:58,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:58,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:58,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:58,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:58,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:58,650 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:58,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:58,654 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:58,686 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:50:58,687 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:58,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:50:58,687 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:50:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:58,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997149557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:58,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:58,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:58,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815749318] [2021-06-12 19:50:58,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:58,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:58,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:58,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:58,732 INFO L87 Difference]: Start difference. First operand 55 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:58,961 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-06-12 19:50:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:50:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:58,973 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:50:58,973 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 19:50:58,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:50:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 19:50:58,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-06-12 19:50:58,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:58,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-06-12 19:50:58,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-06-12 19:50:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:58,977 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-06-12 19:50:58,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-06-12 19:50:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:58,978 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:58,978 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:59,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:59,178 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:59,179 INFO L82 PathProgramCache]: Analyzing trace with hash 566811034, now seen corresponding path program 21 times [2021-06-12 19:50:59,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:59,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130500070] [2021-06-12 19:50:59,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:59,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:59,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130500070] [2021-06-12 19:50:59,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130500070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:59,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515818170] [2021-06-12 19:50:59,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:59,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:50:59,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:59,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:59,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:59,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:59,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:59,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:59,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:59,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:59,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:59,345 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:50:59,345 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:59,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:59,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:50:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:59,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515818170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:59,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:59,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:50:59,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199332225] [2021-06-12 19:50:59,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:50:59,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:59,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:50:59,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:59,364 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:59,439 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-06-12 19:50:59,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:50:59,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:59,440 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:50:59,440 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 19:50:59,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:50:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 19:50:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-06-12 19:50:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-06-12 19:50:59,442 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-06-12 19:50:59,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:59,442 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-06-12 19:50:59,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-06-12 19:50:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:59,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:59,442 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:50:59,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 19:50:59,653 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:50:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:50:59,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1546997946, now seen corresponding path program 22 times [2021-06-12 19:50:59,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:50:59,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580532320] [2021-06-12 19:50:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:50:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:50:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:59,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:50:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580532320] [2021-06-12 19:50:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580532320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673576705] [2021-06-12 19:50:59,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:50:59,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:50:59,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:50:59,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:50:59,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:50:59,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:50:59,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:50:59,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:59,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:50:59,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:50:59,806 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 19:50:59,806 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:50:59,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:50:59,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 19:50:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:50:59,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673576705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:50:59,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:50:59,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:50:59,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747009625] [2021-06-12 19:50:59,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:50:59,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:50:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:50:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:50:59,822 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:50:59,909 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-06-12 19:50:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:50:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:50:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:50:59,909 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:50:59,910 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 19:50:59,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:50:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 19:50:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2021-06-12 19:50:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1538461538461537) internal successors, (112), 52 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 112 transitions. [2021-06-12 19:50:59,911 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 112 transitions. Word has length 13 [2021-06-12 19:50:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:50:59,911 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 112 transitions. [2021-06-12 19:50:59,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:50:59,911 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 112 transitions. [2021-06-12 19:50:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:50:59,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:50:59,912 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:00,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:00,121 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:00,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1390433762, now seen corresponding path program 23 times [2021-06-12 19:51:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:00,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131460953] [2021-06-12 19:51:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:00,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131460953] [2021-06-12 19:51:00,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131460953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70032373] [2021-06-12 19:51:00,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:00,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:00,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:00,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:00,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:00,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:00,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:00,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:00,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:00,277 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:00,280 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,306 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-06-12 19:51:00,306 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:00,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:00,307 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 19:51:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70032373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:00,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:51:00,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821023853] [2021-06-12 19:51:00,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:51:00,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:51:00,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:51:00,329 INFO L87 Difference]: Start difference. First operand 53 states and 112 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:00,522 INFO L93 Difference]: Finished difference Result 80 states and 158 transitions. [2021-06-12 19:51:00,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:51:00,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:00,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:00,523 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:51:00,523 INFO L226 Difference]: Without dead ends: 77 [2021-06-12 19:51:00,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-12 19:51:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2021-06-12 19:51:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.1346153846153846) internal successors, (111), 52 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:00,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 111 transitions. [2021-06-12 19:51:00,524 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 111 transitions. Word has length 13 [2021-06-12 19:51:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:00,525 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 111 transitions. [2021-06-12 19:51:00,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 111 transitions. [2021-06-12 19:51:00,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:00,525 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:00,525 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:00,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-12 19:51:00,733 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1413378020, now seen corresponding path program 24 times [2021-06-12 19:51:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:00,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677366353] [2021-06-12 19:51:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:00,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677366353] [2021-06-12 19:51:00,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677366353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352841252] [2021-06-12 19:51:00,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:00,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:51:00,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:00,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:00,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:00,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:00,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:00,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:00,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:00,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,931 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:00,932 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:00,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:00,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:00,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352841252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:00,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:00,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844796763] [2021-06-12 19:51:00,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:00,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:00,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:00,949 INFO L87 Difference]: Start difference. First operand 53 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:01,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:01,003 INFO L93 Difference]: Finished difference Result 83 states and 167 transitions. [2021-06-12 19:51:01,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:51:01,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:01,004 INFO L225 Difference]: With dead ends: 83 [2021-06-12 19:51:01,004 INFO L226 Difference]: Without dead ends: 83 [2021-06-12 19:51:01,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:01,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-12 19:51:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2021-06-12 19:51:01,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:01,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 114 transitions. [2021-06-12 19:51:01,006 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 114 transitions. Word has length 13 [2021-06-12 19:51:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:01,006 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 114 transitions. [2021-06-12 19:51:01,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:01,006 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 114 transitions. [2021-06-12 19:51:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:01,006 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:01,006 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:01,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 19:51:01,222 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1961888568, now seen corresponding path program 25 times [2021-06-12 19:51:01,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:01,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151238218] [2021-06-12 19:51:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:01,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:01,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151238218] [2021-06-12 19:51:01,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151238218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:01,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913128648] [2021-06-12 19:51:01,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:01,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:01,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:01,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:01,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:01,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:01,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:01,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:01,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:01,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:01,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:01,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:01,415 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:01,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:01,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:01,447 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:51:01,447 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:01,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:01,448 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:51:01,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:01,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913128648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:01,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:01,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:01,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851415149] [2021-06-12 19:51:01,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:01,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:01,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:01,472 INFO L87 Difference]: Start difference. First operand 54 states and 114 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:01,703 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-06-12 19:51:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:51:01,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:01,703 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:51:01,703 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 19:51:01,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:51:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 19:51:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-06-12 19:51:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 113 transitions. [2021-06-12 19:51:01,705 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 113 transitions. Word has length 13 [2021-06-12 19:51:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:01,705 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 113 transitions. [2021-06-12 19:51:01,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 113 transitions. [2021-06-12 19:51:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:01,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:01,705 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:01,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 19:51:01,909 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:01,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:01,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1405647622, now seen corresponding path program 26 times [2021-06-12 19:51:01,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:01,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413608747] [2021-06-12 19:51:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:01,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:01,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413608747] [2021-06-12 19:51:01,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413608747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:01,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118716429] [2021-06-12 19:51:01,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:02,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:02,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:02,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:02,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:02,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:02,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:02,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:02,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:02,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,097 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:02,097 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:02,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:02,098 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:02,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118716429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:02,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:02,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:02,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837929661] [2021-06-12 19:51:02,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:02,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:02,136 INFO L87 Difference]: Start difference. First operand 54 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:02,365 INFO L93 Difference]: Finished difference Result 122 states and 227 transitions. [2021-06-12 19:51:02,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:51:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:02,365 INFO L225 Difference]: With dead ends: 122 [2021-06-12 19:51:02,365 INFO L226 Difference]: Without dead ends: 122 [2021-06-12 19:51:02,366 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:51:02,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-06-12 19:51:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 57. [2021-06-12 19:51:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 56 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 124 transitions. [2021-06-12 19:51:02,367 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 124 transitions. Word has length 13 [2021-06-12 19:51:02,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:02,367 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 124 transitions. [2021-06-12 19:51:02,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 124 transitions. [2021-06-12 19:51:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:02,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:02,368 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:02,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:02,581 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash -604031394, now seen corresponding path program 27 times [2021-06-12 19:51:02,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:02,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826633230] [2021-06-12 19:51:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:02,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826633230] [2021-06-12 19:51:02,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826633230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:02,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226240775] [2021-06-12 19:51:02,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:02,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:02,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:02,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:02,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:02,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:02,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:02,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:02,735 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:02,739 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:02,770 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:02,770 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:02,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:02,771 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:02,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226240775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:02,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:02,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:02,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554021353] [2021-06-12 19:51:02,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:02,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:02,851 INFO L87 Difference]: Start difference. First operand 57 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:03,332 INFO L93 Difference]: Finished difference Result 115 states and 215 transitions. [2021-06-12 19:51:03,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:51:03,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:03,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:03,337 INFO L225 Difference]: With dead ends: 115 [2021-06-12 19:51:03,337 INFO L226 Difference]: Without dead ends: 112 [2021-06-12 19:51:03,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 478.4ms TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:51:03,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-12 19:51:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 58. [2021-06-12 19:51:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.210526315789474) internal successors, (126), 57 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 126 transitions. [2021-06-12 19:51:03,339 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 126 transitions. Word has length 13 [2021-06-12 19:51:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:03,339 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 126 transitions. [2021-06-12 19:51:03,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 126 transitions. [2021-06-12 19:51:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:03,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:03,340 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:03,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:03,540 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1114312312, now seen corresponding path program 28 times [2021-06-12 19:51:03,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:03,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821809266] [2021-06-12 19:51:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:03,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:03,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821809266] [2021-06-12 19:51:03,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821809266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:03,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756200202] [2021-06-12 19:51:03,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:03,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:03,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:03,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:03,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:03,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:03,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:03,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:03,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:03,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:03,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:03,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:03,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:03,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:03,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:03,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:03,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:03,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:03,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:03,760 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:03,760 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:03,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:03,761 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:03,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756200202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:03,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:03,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:03,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201862279] [2021-06-12 19:51:03,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:03,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:03,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:03,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:03,808 INFO L87 Difference]: Start difference. First operand 58 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:04,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:04,059 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-06-12 19:51:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:51:04,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:04,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:04,060 INFO L225 Difference]: With dead ends: 105 [2021-06-12 19:51:04,060 INFO L226 Difference]: Without dead ends: 105 [2021-06-12 19:51:04,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-12 19:51:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 56. [2021-06-12 19:51:04,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.1454545454545455) internal successors, (118), 55 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 118 transitions. [2021-06-12 19:51:04,061 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 118 transitions. Word has length 13 [2021-06-12 19:51:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:04,061 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 118 transitions. [2021-06-12 19:51:04,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 118 transitions. [2021-06-12 19:51:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:04,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:04,062 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:04,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-12 19:51:04,277 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash 732792740, now seen corresponding path program 29 times [2021-06-12 19:51:04,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:04,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463591256] [2021-06-12 19:51:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:04,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:04,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463591256] [2021-06-12 19:51:04,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463591256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:04,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449894754] [2021-06-12 19:51:04,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:51:04,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:04,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:04,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:04,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:04,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:04,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:04,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:04,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:04,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,448 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:04,449 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:04,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,450 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:04,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449894754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:04,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:04,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:04,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075876612] [2021-06-12 19:51:04,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:04,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:04,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:04,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:04,466 INFO L87 Difference]: Start difference. First operand 56 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:04,570 INFO L93 Difference]: Finished difference Result 91 states and 181 transitions. [2021-06-12 19:51:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:51:04,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:04,571 INFO L225 Difference]: With dead ends: 91 [2021-06-12 19:51:04,571 INFO L226 Difference]: Without dead ends: 91 [2021-06-12 19:51:04,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-12 19:51:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-06-12 19:51:04,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.23728813559322) internal successors, (132), 59 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:04,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 132 transitions. [2021-06-12 19:51:04,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 132 transitions. Word has length 13 [2021-06-12 19:51:04,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:04,572 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 132 transitions. [2021-06-12 19:51:04,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 132 transitions. [2021-06-12 19:51:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:04,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:04,573 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:04,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:04,773 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:04,773 INFO L82 PathProgramCache]: Analyzing trace with hash -186907968, now seen corresponding path program 30 times [2021-06-12 19:51:04,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:04,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708552968] [2021-06-12 19:51:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:04,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:04,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708552968] [2021-06-12 19:51:04,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708552968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:04,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079713817] [2021-06-12 19:51:04,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:04,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:51:04,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:04,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:04,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:04,944 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:04,948 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:04,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:04,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:04,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:04,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:04,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:04,959 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:04,988 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:51:04,991 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:04,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:04,994 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:51:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:05,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079713817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:05,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:05,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:05,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028152415] [2021-06-12 19:51:05,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:05,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:05,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:05,020 INFO L87 Difference]: Start difference. First operand 60 states and 132 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:05,260 INFO L93 Difference]: Finished difference Result 80 states and 161 transitions. [2021-06-12 19:51:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:05,261 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:51:05,261 INFO L226 Difference]: Without dead ends: 78 [2021-06-12 19:51:05,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:51:05,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-12 19:51:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-06-12 19:51:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.216666666666667) internal successors, (133), 60 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 133 transitions. [2021-06-12 19:51:05,262 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 133 transitions. Word has length 13 [2021-06-12 19:51:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:05,262 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 133 transitions. [2021-06-12 19:51:05,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 133 transitions. [2021-06-12 19:51:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:05,263 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:05,263 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:05,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-12 19:51:05,471 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:05,471 INFO L82 PathProgramCache]: Analyzing trace with hash 740523138, now seen corresponding path program 31 times [2021-06-12 19:51:05,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:05,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353565431] [2021-06-12 19:51:05,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:05,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:05,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353565431] [2021-06-12 19:51:05,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353565431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:05,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389584473] [2021-06-12 19:51:05,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:05,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:05,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:05,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:05,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:05,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:05,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:05,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:05,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:05,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:05,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:05,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:05,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:05,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:05,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:05,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:05,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:05,717 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:05,717 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:05,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:05,718 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:05,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389584473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:05,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:05,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:05,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227914898] [2021-06-12 19:51:05,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:05,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:05,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:05,761 INFO L87 Difference]: Start difference. First operand 61 states and 133 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:05,929 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-06-12 19:51:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:51:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:05,929 INFO L225 Difference]: With dead ends: 105 [2021-06-12 19:51:05,930 INFO L226 Difference]: Without dead ends: 105 [2021-06-12 19:51:05,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:05,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-12 19:51:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 59. [2021-06-12 19:51:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.206896551724138) internal successors, (128), 58 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 128 transitions. [2021-06-12 19:51:05,931 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 128 transitions. Word has length 13 [2021-06-12 19:51:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:05,931 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 128 transitions. [2021-06-12 19:51:05,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 128 transitions. [2021-06-12 19:51:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:05,931 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:05,932 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:06,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:06,146 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1542139366, now seen corresponding path program 32 times [2021-06-12 19:51:06,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:06,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110183919] [2021-06-12 19:51:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:06,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110183919] [2021-06-12 19:51:06,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110183919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:06,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623176316] [2021-06-12 19:51:06,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:06,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:06,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:06,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:06,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:06,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:06,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:06,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:06,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:06,313 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:06,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:06,351 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:06,351 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:06,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:06,352 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:06,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623176316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:06,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:06,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473530373] [2021-06-12 19:51:06,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:06,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:06,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:06,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:06,402 INFO L87 Difference]: Start difference. First operand 59 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:06,618 INFO L93 Difference]: Finished difference Result 87 states and 167 transitions. [2021-06-12 19:51:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:06,619 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:06,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:06,619 INFO L225 Difference]: With dead ends: 87 [2021-06-12 19:51:06,619 INFO L226 Difference]: Without dead ends: 84 [2021-06-12 19:51:06,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-12 19:51:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 60. [2021-06-12 19:51:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-06-12 19:51:06,621 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 13 [2021-06-12 19:51:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:06,621 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-06-12 19:51:06,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-06-12 19:51:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:06,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:06,621 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:06,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-12 19:51:06,837 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:06,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:06,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1034484224, now seen corresponding path program 33 times [2021-06-12 19:51:06,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:06,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91129455] [2021-06-12 19:51:06,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:06,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91129455] [2021-06-12 19:51:06,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91129455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:06,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197659596] [2021-06-12 19:51:06,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:06,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:06,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:06,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:06,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:06,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:06,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:06,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:06,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:06,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:06,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:06,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:06,971 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:07,003 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:07,003 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:07,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:07,004 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:07,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197659596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:07,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:07,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:07,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786207342] [2021-06-12 19:51:07,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:07,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:07,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:07,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:07,047 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:07,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:07,160 INFO L93 Difference]: Finished difference Result 80 states and 161 transitions. [2021-06-12 19:51:07,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:51:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:07,161 INFO L225 Difference]: With dead ends: 80 [2021-06-12 19:51:07,161 INFO L226 Difference]: Without dead ends: 80 [2021-06-12 19:51:07,161 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 143.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-12 19:51:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 55. [2021-06-12 19:51:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 54 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:07,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 115 transitions. [2021-06-12 19:51:07,162 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 115 transitions. Word has length 13 [2021-06-12 19:51:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:07,162 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 115 transitions. [2021-06-12 19:51:07,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:07,162 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 115 transitions. [2021-06-12 19:51:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:07,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:07,164 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:07,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-12 19:51:07,377 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash -748881858, now seen corresponding path program 34 times [2021-06-12 19:51:07,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:07,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001186507] [2021-06-12 19:51:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:07,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:07,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001186507] [2021-06-12 19:51:07,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001186507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:07,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451458045] [2021-06-12 19:51:07,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:07,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:07,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:07,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:07,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:07,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:07,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:07,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:07,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:07,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:07,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:07,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:07,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:07,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:07,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:07,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:07,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:07,546 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:07,547 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:07,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:07,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:07,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451458045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:07,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:07,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:07,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532090403] [2021-06-12 19:51:07,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:07,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:07,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:07,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:07,600 INFO L87 Difference]: Start difference. First operand 55 states and 115 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:07,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:07,731 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-06-12 19:51:07,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:51:07,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:07,732 INFO L225 Difference]: With dead ends: 105 [2021-06-12 19:51:07,732 INFO L226 Difference]: Without dead ends: 105 [2021-06-12 19:51:07,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:07,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-12 19:51:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 57. [2021-06-12 19:51:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.1964285714285716) internal successors, (123), 56 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 123 transitions. [2021-06-12 19:51:07,733 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 123 transitions. Word has length 13 [2021-06-12 19:51:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:07,733 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 123 transitions. [2021-06-12 19:51:07,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 123 transitions. [2021-06-12 19:51:07,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:07,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:07,734 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:07,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:07,953 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:07,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:07,953 INFO L82 PathProgramCache]: Analyzing trace with hash 52734370, now seen corresponding path program 35 times [2021-06-12 19:51:07,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:07,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428582374] [2021-06-12 19:51:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:08,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428582374] [2021-06-12 19:51:08,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428582374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61124264] [2021-06-12 19:51:08,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:08,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:08,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:08,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:08,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:08,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:08,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:08,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:08,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:08,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,161 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:08,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:08,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:08,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61124264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:08,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:08,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586338695] [2021-06-12 19:51:08,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:08,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:08,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:08,225 INFO L87 Difference]: Start difference. First operand 57 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:08,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:08,513 INFO L93 Difference]: Finished difference Result 93 states and 173 transitions. [2021-06-12 19:51:08,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:51:08,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:08,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:08,514 INFO L225 Difference]: With dead ends: 93 [2021-06-12 19:51:08,514 INFO L226 Difference]: Without dead ends: 88 [2021-06-12 19:51:08,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:51:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-12 19:51:08,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-06-12 19:51:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.175438596491228) internal successors, (124), 57 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 124 transitions. [2021-06-12 19:51:08,515 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 124 transitions. Word has length 13 [2021-06-12 19:51:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:08,515 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 124 transitions. [2021-06-12 19:51:08,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 124 transitions. [2021-06-12 19:51:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:08,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:08,516 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:08,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:08,729 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:08,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:08,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1771078076, now seen corresponding path program 36 times [2021-06-12 19:51:08,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:08,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268629661] [2021-06-12 19:51:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:08,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268629661] [2021-06-12 19:51:08,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268629661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146383753] [2021-06-12 19:51:08,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:08,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:08,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:08,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:08,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:08,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:08,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:08,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:08,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:08,925 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:08,925 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:08,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:08,926 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:08,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146383753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:08,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:08,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:08,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175768764] [2021-06-12 19:51:08,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:08,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:08,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:08,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:08,974 INFO L87 Difference]: Start difference. First operand 58 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:09,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:09,140 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-06-12 19:51:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:51:09,140 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:09,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:09,140 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:51:09,141 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 19:51:09,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 19:51:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 57. [2021-06-12 19:51:09,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.125) internal successors, (119), 56 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:09,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 119 transitions. [2021-06-12 19:51:09,142 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 119 transitions. Word has length 13 [2021-06-12 19:51:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:09,142 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 119 transitions. [2021-06-12 19:51:09,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 119 transitions. [2021-06-12 19:51:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 19:51:09,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:09,142 INFO L472 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:09,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:09,357 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash 60464768, now seen corresponding path program 37 times [2021-06-12 19:51:09,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:09,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91391203] [2021-06-12 19:51:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:09,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:09,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91391203] [2021-06-12 19:51:09,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91391203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:09,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422204578] [2021-06-12 19:51:09,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:09,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:51:09,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:09,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:09,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:09,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:09,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:09,508 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:51:09,508 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:09,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:09,509 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:51:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:09,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422204578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:09,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:09,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-12 19:51:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003346200] [2021-06-12 19:51:09,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:51:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:51:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:09,528 INFO L87 Difference]: Start difference. First operand 57 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:09,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:09,592 INFO L93 Difference]: Finished difference Result 82 states and 162 transitions. [2021-06-12 19:51:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:51:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 19:51:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:09,593 INFO L225 Difference]: With dead ends: 82 [2021-06-12 19:51:09,593 INFO L226 Difference]: Without dead ends: 82 [2021-06-12 19:51:09,593 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:51:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-12 19:51:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2021-06-12 19:51:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 51 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2021-06-12 19:51:09,594 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 13 [2021-06-12 19:51:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:09,594 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2021-06-12 19:51:09,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2021-06-12 19:51:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:09,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:09,594 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:09,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:09,795 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:09,796 INFO L82 PathProgramCache]: Analyzing trace with hash -127183706, now seen corresponding path program 38 times [2021-06-12 19:51:09,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:09,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860653580] [2021-06-12 19:51:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:10,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:10,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860653580] [2021-06-12 19:51:10,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860653580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:10,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496501357] [2021-06-12 19:51:10,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:10,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:10,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:10,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:10,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:10,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:10,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:10,674 INFO L628 ElimStorePlain]: treesize reduction 111, result has 9.0 percent of original size [2021-06-12 19:51:10,675 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:10,675 INFO L518 ElimStorePlain]: Eliminatee v_prenex_23 vanished before elimination [2021-06-12 19:51:10,675 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-06-12 19:51:10,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:10,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-12 19:51:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496501357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:10,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:10,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 19:51:10,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863209951] [2021-06-12 19:51:10,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:10,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:10,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:10,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:10,699 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:11,659 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-06-12 19:51:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:11,692 INFO L93 Difference]: Finished difference Result 111 states and 206 transitions. [2021-06-12 19:51:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:11,693 INFO L225 Difference]: With dead ends: 111 [2021-06-12 19:51:11,693 INFO L226 Difference]: Without dead ends: 108 [2021-06-12 19:51:11,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1360.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-12 19:51:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 62. [2021-06-12 19:51:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-06-12 19:51:11,694 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 14 [2021-06-12 19:51:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:11,694 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-06-12 19:51:11,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-06-12 19:51:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:11,695 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:11,695 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:11,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:11,905 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:11,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:11,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1602893270, now seen corresponding path program 39 times [2021-06-12 19:51:11,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:11,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883919694] [2021-06-12 19:51:11,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:12,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:12,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883919694] [2021-06-12 19:51:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883919694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:12,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052073928] [2021-06-12 19:51:12,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:12,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:12,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:12,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:12,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:12,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:12,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:12,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:12,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:12,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-06-12 19:51:12,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:12,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:12,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:12,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:12,514 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:12,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:12,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:12,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-12 19:51:12,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:12,536 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-12 19:51:12,536 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:12,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:12,537 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-12 19:51:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:12,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052073928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:12,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:12,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 19:51:12,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037123644] [2021-06-12 19:51:12,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:12,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:12,546 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:13,190 INFO L93 Difference]: Finished difference Result 118 states and 238 transitions. [2021-06-12 19:51:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:51:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:13,192 INFO L225 Difference]: With dead ends: 118 [2021-06-12 19:51:13,192 INFO L226 Difference]: Without dead ends: 110 [2021-06-12 19:51:13,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 896.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-12 19:51:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-06-12 19:51:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.282051282051282) internal successors, (178), 78 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 178 transitions. [2021-06-12 19:51:13,194 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 178 transitions. Word has length 14 [2021-06-12 19:51:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:13,194 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 178 transitions. [2021-06-12 19:51:13,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 178 transitions. [2021-06-12 19:51:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:13,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:13,194 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:13,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 19:51:13,409 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:13,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1595162872, now seen corresponding path program 40 times [2021-06-12 19:51:13,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:13,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177399572] [2021-06-12 19:51:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:13,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:13,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177399572] [2021-06-12 19:51:13,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177399572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:13,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968059049] [2021-06-12 19:51:13,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:13,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:13,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:13,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:13,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:13,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:13,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:13,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:13,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:13,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:13,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:13,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:13,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 19:51:13,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:13,902 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-06-12 19:51:13,903 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:13,903 INFO L518 ElimStorePlain]: Eliminatee v_prenex_25 vanished before elimination [2021-06-12 19:51:13,903 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-06-12 19:51:13,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:13,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-12 19:51:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968059049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:13,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:13,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:51:13,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538099710] [2021-06-12 19:51:13,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:51:13,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:51:13,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:13,913 INFO L87 Difference]: Start difference. First operand 79 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:14,330 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-06-12 19:51:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:51:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:14,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:14,331 INFO L225 Difference]: With dead ends: 108 [2021-06-12 19:51:14,331 INFO L226 Difference]: Without dead ends: 104 [2021-06-12 19:51:14,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 590.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:51:14,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-12 19:51:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2021-06-12 19:51:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 85 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 198 transitions. [2021-06-12 19:51:14,333 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 198 transitions. Word has length 14 [2021-06-12 19:51:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:14,333 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 198 transitions. [2021-06-12 19:51:14,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 198 transitions. [2021-06-12 19:51:14,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:14,333 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:14,333 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:14,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-12 19:51:14,534 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1210399428, now seen corresponding path program 41 times [2021-06-12 19:51:14,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:14,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698055143] [2021-06-12 19:51:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:14,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:14,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698055143] [2021-06-12 19:51:14,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698055143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:14,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297019679] [2021-06-12 19:51:14,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:14,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:14,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:14,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:14,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:14,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:14,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:14,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:14,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:14,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 19:51:14,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:15,000 INFO L628 ElimStorePlain]: treesize reduction 88, result has 11.1 percent of original size [2021-06-12 19:51:15,001 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:15,001 INFO L518 ElimStorePlain]: Eliminatee v_prenex_31 vanished before elimination [2021-06-12 19:51:15,001 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-06-12 19:51:15,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:15,002 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-12 19:51:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:15,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297019679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:15,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:15,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:51:15,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329133094] [2021-06-12 19:51:15,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:51:15,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:15,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:51:15,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:15,050 INFO L87 Difference]: Start difference. First operand 86 states and 198 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:15,419 INFO L93 Difference]: Finished difference Result 104 states and 232 transitions. [2021-06-12 19:51:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:51:15,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:15,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:15,420 INFO L225 Difference]: With dead ends: 104 [2021-06-12 19:51:15,420 INFO L226 Difference]: Without dead ends: 101 [2021-06-12 19:51:15,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 513.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:15,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-12 19:51:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2021-06-12 19:51:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3294117647058825) internal successors, (198), 85 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 198 transitions. [2021-06-12 19:51:15,421 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 198 transitions. Word has length 14 [2021-06-12 19:51:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:15,421 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 198 transitions. [2021-06-12 19:51:15,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 198 transitions. [2021-06-12 19:51:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:15,422 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:15,422 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:15,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:15,637 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash -221091546, now seen corresponding path program 42 times [2021-06-12 19:51:15,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:15,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600709325] [2021-06-12 19:51:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:15,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:15,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600709325] [2021-06-12 19:51:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600709325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:15,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663519230] [2021-06-12 19:51:15,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:15,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:51:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:15,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:16,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:16,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-12 19:51:16,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:16,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:16,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:16,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:16,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:16,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,091 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-12 19:51:16,091 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:16,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:16,092 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-06-12 19:51:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:16,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663519230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:16,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:16,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 19:51:16,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162475971] [2021-06-12 19:51:16,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:16,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:16,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:16,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:16,114 INFO L87 Difference]: Start difference. First operand 86 states and 198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:16,355 INFO L93 Difference]: Finished difference Result 99 states and 223 transitions. [2021-06-12 19:51:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:51:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:16,356 INFO L225 Difference]: With dead ends: 99 [2021-06-12 19:51:16,356 INFO L226 Difference]: Without dead ends: 96 [2021-06-12 19:51:16,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 430.8ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-12 19:51:16,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-06-12 19:51:16,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.32183908045977) internal successors, (202), 87 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 202 transitions. [2021-06-12 19:51:16,357 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 202 transitions. Word has length 14 [2021-06-12 19:51:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:16,358 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 202 transitions. [2021-06-12 19:51:16,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:16,358 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 202 transitions. [2021-06-12 19:51:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:16,358 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:16,358 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:16,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2021-06-12 19:51:16,564 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:16,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:16,564 INFO L82 PathProgramCache]: Analyzing trace with hash 26281190, now seen corresponding path program 43 times [2021-06-12 19:51:16,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:16,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211146425] [2021-06-12 19:51:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:16,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211146425] [2021-06-12 19:51:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211146425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007826582] [2021-06-12 19:51:16,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:16,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:16,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:17,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:17,046 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-06-12 19:51:17,046 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:17,046 INFO L518 ElimStorePlain]: Eliminatee v_prenex_34 vanished before elimination [2021-06-12 19:51:17,046 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-06-12 19:51:17,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:17,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-12 19:51:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:17,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007826582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:17,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:17,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:51:17,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358413392] [2021-06-12 19:51:17,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:51:17,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:17,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:51:17,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:17,058 INFO L87 Difference]: Start difference. First operand 88 states and 202 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:17,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:17,278 INFO L93 Difference]: Finished difference Result 145 states and 308 transitions. [2021-06-12 19:51:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:51:17,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:17,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:17,279 INFO L225 Difference]: With dead ends: 145 [2021-06-12 19:51:17,279 INFO L226 Difference]: Without dead ends: 142 [2021-06-12 19:51:17,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:17,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-12 19:51:17,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2021-06-12 19:51:17,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.4693877551020407) internal successors, (242), 98 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:17,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 242 transitions. [2021-06-12 19:51:17,281 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 242 transitions. Word has length 14 [2021-06-12 19:51:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:17,281 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 242 transitions. [2021-06-12 19:51:17,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 242 transitions. [2021-06-12 19:51:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:17,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:17,281 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:17,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:17,492 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:17,493 INFO L82 PathProgramCache]: Analyzing trace with hash -390038426, now seen corresponding path program 44 times [2021-06-12 19:51:17,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:17,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013597178] [2021-06-12 19:51:17,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:17,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:17,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013597178] [2021-06-12 19:51:17,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013597178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:17,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560974964] [2021-06-12 19:51:17,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:17,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:17,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:17,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:51:17,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:51:17,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:17,904 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-06-12 19:51:17,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:17,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:17,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:17,976 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-06-12 19:51:17,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:17,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:51:17,980 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:51:18,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:18,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:18,004 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:245, output treesize:62 [2021-06-12 19:51:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:18,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560974964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:18,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:18,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 19:51:18,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548033125] [2021-06-12 19:51:18,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:18,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:18,063 INFO L87 Difference]: Start difference. First operand 99 states and 242 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:18,300 INFO L93 Difference]: Finished difference Result 161 states and 353 transitions. [2021-06-12 19:51:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:51:18,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:18,301 INFO L225 Difference]: With dead ends: 161 [2021-06-12 19:51:18,301 INFO L226 Difference]: Without dead ends: 155 [2021-06-12 19:51:18,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-12 19:51:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 112. [2021-06-12 19:51:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.5315315315315314) internal successors, (281), 111 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 281 transitions. [2021-06-12 19:51:18,303 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 281 transitions. Word has length 14 [2021-06-12 19:51:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:18,303 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 281 transitions. [2021-06-12 19:51:18,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 281 transitions. [2021-06-12 19:51:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:18,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:18,303 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:18,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-12 19:51:18,504 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:18,504 INFO L82 PathProgramCache]: Analyzing trace with hash 732601002, now seen corresponding path program 45 times [2021-06-12 19:51:18,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:18,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838880528] [2021-06-12 19:51:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:18,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:18,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838880528] [2021-06-12 19:51:18,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838880528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:18,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514627667] [2021-06-12 19:51:18,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:18,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:18,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:18,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:18,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:19,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:19,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:19,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:19,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:19,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:19,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:19,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:19,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:19,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:19,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 19:51:19,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:19,327 INFO L628 ElimStorePlain]: treesize reduction 69, result has 50.0 percent of original size [2021-06-12 19:51:19,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:19,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:51:19,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:19,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:19,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-06-12 19:51:19,357 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:19,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:19,368 INFO L518 ElimStorePlain]: Eliminatee v_prenex_39 vanished before elimination [2021-06-12 19:51:19,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:19,369 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:177, output treesize:22 [2021-06-12 19:51:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:19,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514627667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:19,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:19,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 19:51:19,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302034205] [2021-06-12 19:51:19,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:19,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:19,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:19,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:19,401 INFO L87 Difference]: Start difference. First operand 112 states and 281 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:20,094 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2021-06-12 19:51:20,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:20,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:20,095 INFO L225 Difference]: With dead ends: 178 [2021-06-12 19:51:20,096 INFO L226 Difference]: Without dead ends: 175 [2021-06-12 19:51:20,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1042.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:51:20,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-12 19:51:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2021-06-12 19:51:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.52212389380531) internal successors, (285), 113 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 285 transitions. [2021-06-12 19:51:20,098 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 285 transitions. Word has length 14 [2021-06-12 19:51:20,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:20,098 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 285 transitions. [2021-06-12 19:51:20,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:20,098 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 285 transitions. [2021-06-12 19:51:20,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:20,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:20,098 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:20,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:20,313 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash -844740728, now seen corresponding path program 46 times [2021-06-12 19:51:20,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:20,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919685599] [2021-06-12 19:51:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:20,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:20,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919685599] [2021-06-12 19:51:20,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919685599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:20,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673790434] [2021-06-12 19:51:20,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:20,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:20,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:20,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:20,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:20,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:20,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:20,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:20,841 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-06-12 19:51:20,841 INFO L518 ElimStorePlain]: Eliminatee v_prenex_43 vanished before elimination [2021-06-12 19:51:20,841 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:20,841 INFO L518 ElimStorePlain]: Eliminatee v_prenex_44 vanished before elimination [2021-06-12 19:51:20,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:20,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-12 19:51:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:20,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673790434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:20,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:20,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 19:51:20,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164990893] [2021-06-12 19:51:20,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:20,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:20,861 INFO L87 Difference]: Start difference. First operand 114 states and 285 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:21,150 INFO L93 Difference]: Finished difference Result 140 states and 336 transitions. [2021-06-12 19:51:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:51:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:21,151 INFO L225 Difference]: With dead ends: 140 [2021-06-12 19:51:21,151 INFO L226 Difference]: Without dead ends: 137 [2021-06-12 19:51:21,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 464.3ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:51:21,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-12 19:51:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2021-06-12 19:51:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.52212389380531) internal successors, (285), 113 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 285 transitions. [2021-06-12 19:51:21,153 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 285 transitions. Word has length 14 [2021-06-12 19:51:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:21,153 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 285 transitions. [2021-06-12 19:51:21,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 285 transitions. [2021-06-12 19:51:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:21,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:21,154 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:21,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:21,365 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -605098390, now seen corresponding path program 47 times [2021-06-12 19:51:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:21,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941845776] [2021-06-12 19:51:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:21,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:21,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941845776] [2021-06-12 19:51:21,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941845776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:21,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629749241] [2021-06-12 19:51:21,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:21,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:21,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:21,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:21,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:21,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:21,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:21,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,929 INFO L628 ElimStorePlain]: treesize reduction 107, result has 9.3 percent of original size [2021-06-12 19:51:21,930 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:21,930 INFO L518 ElimStorePlain]: Eliminatee v_prenex_47 vanished before elimination [2021-06-12 19:51:21,930 INFO L518 ElimStorePlain]: Eliminatee v_prenex_46 vanished before elimination [2021-06-12 19:51:21,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:21,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-12 19:51:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:21,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629749241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:21,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:21,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-12 19:51:21,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245949886] [2021-06-12 19:51:21,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:21,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:21,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:21,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:21,939 INFO L87 Difference]: Start difference. First operand 114 states and 285 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:22,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:22,414 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2021-06-12 19:51:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:51:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:22,415 INFO L225 Difference]: With dead ends: 149 [2021-06-12 19:51:22,415 INFO L226 Difference]: Without dead ends: 144 [2021-06-12 19:51:22,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 713.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:51:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-06-12 19:51:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-06-12 19:51:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5478260869565217) internal successors, (293), 115 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:22,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 293 transitions. [2021-06-12 19:51:22,417 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 293 transitions. Word has length 14 [2021-06-12 19:51:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:22,417 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 293 transitions. [2021-06-12 19:51:22,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 293 transitions. [2021-06-12 19:51:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:22,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:22,418 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:22,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-12 19:51:22,629 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash -597367992, now seen corresponding path program 48 times [2021-06-12 19:51:22,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:22,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592794186] [2021-06-12 19:51:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:22,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:22,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592794186] [2021-06-12 19:51:22,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592794186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:22,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543973112] [2021-06-12 19:51:22,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:22,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:22,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:22,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:22,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:23,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:23,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:23,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:23,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:23,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:23,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:23,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:23,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-12 19:51:23,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:23,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:23,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:23,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:23,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:23,109 INFO L628 ElimStorePlain]: treesize reduction 70, result has 13.6 percent of original size [2021-06-12 19:51:23,109 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:23,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:23,109 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-06-12 19:51:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:23,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543973112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:23,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:23,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 19:51:23,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719605977] [2021-06-12 19:51:23,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:23,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:23,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:23,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:23,130 INFO L87 Difference]: Start difference. First operand 116 states and 293 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:23,655 INFO L93 Difference]: Finished difference Result 179 states and 405 transitions. [2021-06-12 19:51:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:23,655 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:23,656 INFO L225 Difference]: With dead ends: 179 [2021-06-12 19:51:23,656 INFO L226 Difference]: Without dead ends: 175 [2021-06-12 19:51:23,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-06-12 19:51:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 115. [2021-06-12 19:51:23,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.5526315789473686) internal successors, (291), 114 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 291 transitions. [2021-06-12 19:51:23,658 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 291 transitions. Word has length 14 [2021-06-12 19:51:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:23,658 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 291 transitions. [2021-06-12 19:51:23,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 291 transitions. [2021-06-12 19:51:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:23,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:23,658 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:23,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-12 19:51:23,873 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1262043392, now seen corresponding path program 49 times [2021-06-12 19:51:23,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:23,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045905887] [2021-06-12 19:51:23,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:24,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:24,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045905887] [2021-06-12 19:51:24,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045905887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:24,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340456978] [2021-06-12 19:51:24,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:24,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:24,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:24,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:24,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 19:51:24,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:24,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:24,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:24,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:24,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,392 INFO L628 ElimStorePlain]: treesize reduction 90, result has 10.9 percent of original size [2021-06-12 19:51:24,392 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-06-12 19:51:24,392 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:24,392 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-06-12 19:51:24,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:24,392 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:140, output treesize:11 [2021-06-12 19:51:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:24,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340456978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:24,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:24,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-12 19:51:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180117900] [2021-06-12 19:51:24,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:24,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:24,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:24,414 INFO L87 Difference]: Start difference. First operand 115 states and 291 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:24,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:24,669 INFO L93 Difference]: Finished difference Result 131 states and 321 transitions. [2021-06-12 19:51:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:51:24,669 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:24,670 INFO L225 Difference]: With dead ends: 131 [2021-06-12 19:51:24,670 INFO L226 Difference]: Without dead ends: 128 [2021-06-12 19:51:24,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-12 19:51:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-06-12 19:51:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.5526315789473686) internal successors, (291), 114 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 291 transitions. [2021-06-12 19:51:24,672 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 291 transitions. Word has length 14 [2021-06-12 19:51:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:24,672 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 291 transitions. [2021-06-12 19:51:24,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 291 transitions. [2021-06-12 19:51:24,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:24,673 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:24,673 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:24,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 19:51:24,877 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1720196186, now seen corresponding path program 50 times [2021-06-12 19:51:24,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:24,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163577998] [2021-06-12 19:51:24,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:25,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:25,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163577998] [2021-06-12 19:51:25,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163577998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:25,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998599740] [2021-06-12 19:51:25,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:25,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:25,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:25,401 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 19:51:25,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:25,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:25,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-06-12 19:51:25,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:25,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:25,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:51:25,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,670 INFO L628 ElimStorePlain]: treesize reduction 69, result has 46.5 percent of original size [2021-06-12 19:51:25,670 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:25,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:25,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-12 19:51:25,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:25,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:51:25,689 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:51:25,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:51:25,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:25,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:169, output treesize:22 [2021-06-12 19:51:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:25,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998599740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:25,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:25,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-06-12 19:51:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727350661] [2021-06-12 19:51:25,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:25,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:25,730 INFO L87 Difference]: Start difference. First operand 115 states and 291 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:26,361 INFO L93 Difference]: Finished difference Result 144 states and 342 transitions. [2021-06-12 19:51:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:51:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:26,362 INFO L225 Difference]: With dead ends: 144 [2021-06-12 19:51:26,362 INFO L226 Difference]: Without dead ends: 141 [2021-06-12 19:51:26,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 960.5ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-12 19:51:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 118. [2021-06-12 19:51:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.5641025641025643) internal successors, (300), 117 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 300 transitions. [2021-06-12 19:51:26,364 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 300 transitions. Word has length 14 [2021-06-12 19:51:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:26,364 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 300 transitions. [2021-06-12 19:51:26,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 300 transitions. [2021-06-12 19:51:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:51:26,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:26,364 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:26,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-12 19:51:26,571 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:26,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:26,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1093096512, now seen corresponding path program 51 times [2021-06-12 19:51:26,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:26,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821805019] [2021-06-12 19:51:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:26,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821805019] [2021-06-12 19:51:26,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821805019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:26,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012269493] [2021-06-12 19:51:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:26,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:26,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:26,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:51:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:26,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:26,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:26,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:26,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:26,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:26,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:26,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-06-12 19:51:26,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:26,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:51:26,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:26,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 24 [2021-06-12 19:51:26,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:26,981 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-12 19:51:26,981 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:26,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:26,982 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:128, output treesize:11 [2021-06-12 19:51:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012269493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:26,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:26,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 19:51:26,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227415600] [2021-06-12 19:51:26,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:51:26,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:51:26,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:51:26,992 INFO L87 Difference]: Start difference. First operand 118 states and 300 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:27,309 INFO L93 Difference]: Finished difference Result 173 states and 397 transitions. [2021-06-12 19:51:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:51:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-12 19:51:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:27,310 INFO L225 Difference]: With dead ends: 173 [2021-06-12 19:51:27,310 INFO L226 Difference]: Without dead ends: 170 [2021-06-12 19:51:27,310 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-12 19:51:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 116. [2021-06-12 19:51:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.5565217391304347) internal successors, (294), 115 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 294 transitions. [2021-06-12 19:51:27,312 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 294 transitions. Word has length 14 [2021-06-12 19:51:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:27,312 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 294 transitions. [2021-06-12 19:51:27,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 294 transitions. [2021-06-12 19:51:27,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:27,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:27,313 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:27,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:27,529 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash 351187404, now seen corresponding path program 52 times [2021-06-12 19:51:27,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:27,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926898571] [2021-06-12 19:51:27,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:27,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:27,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926898571] [2021-06-12 19:51:27,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926898571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370609935] [2021-06-12 19:51:27,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:27,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:27,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:27,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:27,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:27,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:27,699 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:27,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:27,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:27,705 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:51:27,708 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:27,736 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-12 19:51:27,736 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:27,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:27,736 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 19:51:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:27,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370609935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:27,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:27,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:51:27,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296103122] [2021-06-12 19:51:27,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:27,760 INFO L87 Difference]: Start difference. First operand 116 states and 294 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:28,004 INFO L93 Difference]: Finished difference Result 155 states and 375 transitions. [2021-06-12 19:51:28,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:28,004 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:28,005 INFO L225 Difference]: With dead ends: 155 [2021-06-12 19:51:28,005 INFO L226 Difference]: Without dead ends: 146 [2021-06-12 19:51:28,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-06-12 19:51:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-06-12 19:51:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.5714285714285716) internal successors, (288), 112 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:28,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 288 transitions. [2021-06-12 19:51:28,006 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 288 transitions. Word has length 15 [2021-06-12 19:51:28,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:28,007 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 288 transitions. [2021-06-12 19:51:28,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:28,007 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 288 transitions. [2021-06-12 19:51:28,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:28,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:28,007 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:28,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 19:51:28,221 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:28,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1964128954, now seen corresponding path program 53 times [2021-06-12 19:51:28,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:28,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030381987] [2021-06-12 19:51:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:28,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030381987] [2021-06-12 19:51:28,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030381987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:28,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336292145] [2021-06-12 19:51:28,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:28,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:28,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:28,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:28,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:28,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:28,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,387 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 19:51:28,388 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:28,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,388 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 19:51:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:28,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336292145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:28,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:28,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:51:28,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263852189] [2021-06-12 19:51:28,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:28,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:28,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:28,404 INFO L87 Difference]: Start difference. First operand 113 states and 288 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:28,523 INFO L93 Difference]: Finished difference Result 155 states and 380 transitions. [2021-06-12 19:51:28,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:28,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:28,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:28,524 INFO L225 Difference]: With dead ends: 155 [2021-06-12 19:51:28,524 INFO L226 Difference]: Without dead ends: 155 [2021-06-12 19:51:28,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-06-12 19:51:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2021-06-12 19:51:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.575221238938053) internal successors, (291), 113 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:28,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 291 transitions. [2021-06-12 19:51:28,526 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 291 transitions. Word has length 15 [2021-06-12 19:51:28,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:28,526 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 291 transitions. [2021-06-12 19:51:28,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 291 transitions. [2021-06-12 19:51:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:28,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:28,526 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:28,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:28,727 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash -313196838, now seen corresponding path program 54 times [2021-06-12 19:51:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:28,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122883531] [2021-06-12 19:51:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:28,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:28,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122883531] [2021-06-12 19:51:28,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122883531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:28,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523037129] [2021-06-12 19:51:28,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:28,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:51:28,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:28,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:28,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:28,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:28,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:28,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:28,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:28,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:28,972 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:28,973 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:28,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:28,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:29,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523037129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:29,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:29,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:29,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853481872] [2021-06-12 19:51:29,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:29,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:29,021 INFO L87 Difference]: Start difference. First operand 114 states and 291 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:29,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:29,347 INFO L93 Difference]: Finished difference Result 200 states and 455 transitions. [2021-06-12 19:51:29,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:29,347 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:29,348 INFO L225 Difference]: With dead ends: 200 [2021-06-12 19:51:29,348 INFO L226 Difference]: Without dead ends: 200 [2021-06-12 19:51:29,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:51:29,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-06-12 19:51:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 120. [2021-06-12 19:51:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.6218487394957983) internal successors, (312), 119 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 312 transitions. [2021-06-12 19:51:29,350 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 312 transitions. Word has length 15 [2021-06-12 19:51:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:29,350 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 312 transitions. [2021-06-12 19:51:29,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:29,350 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 312 transitions. [2021-06-12 19:51:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:29,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:29,350 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:29,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable440 [2021-06-12 19:51:29,565 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 488419390, now seen corresponding path program 55 times [2021-06-12 19:51:29,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:29,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343187049] [2021-06-12 19:51:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:29,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:29,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343187049] [2021-06-12 19:51:29,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343187049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:29,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075055948] [2021-06-12 19:51:29,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:29,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:29,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:29,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:29,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:29,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:29,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:29,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:29,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:29,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:29,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:29,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:29,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:29,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:29,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:29,806 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:29,806 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:29,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:29,807 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:29,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075055948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:29,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:29,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:29,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381033888] [2021-06-12 19:51:29,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:29,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:29,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:29,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:29,875 INFO L87 Difference]: Start difference. First operand 120 states and 312 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:30,576 INFO L93 Difference]: Finished difference Result 212 states and 477 transitions. [2021-06-12 19:51:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:51:30,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:30,577 INFO L225 Difference]: With dead ends: 212 [2021-06-12 19:51:30,577 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:51:30,577 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 673.3ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:51:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:51:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 126. [2021-06-12 19:51:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.632) internal successors, (329), 125 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 329 transitions. [2021-06-12 19:51:30,580 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 329 transitions. Word has length 15 [2021-06-12 19:51:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:30,580 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 329 transitions. [2021-06-12 19:51:30,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 329 transitions. [2021-06-12 19:51:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:30,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:30,580 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:30,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-12 19:51:30,797 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:30,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2088204200, now seen corresponding path program 56 times [2021-06-12 19:51:30,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:30,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192481277] [2021-06-12 19:51:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:30,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192481277] [2021-06-12 19:51:30,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192481277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:30,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701137745] [2021-06-12 19:51:30,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:30,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:30,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:30,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:30,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:30,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:30,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:30,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:30,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:30,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:30,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:30,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:30,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:30,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:30,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:30,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:30,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:30,987 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,016 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:31,016 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:31,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:31,017 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:31,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701137745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:31,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:31,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:31,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171431797] [2021-06-12 19:51:31,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:31,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:31,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:31,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:31,057 INFO L87 Difference]: Start difference. First operand 126 states and 329 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:31,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:31,449 INFO L93 Difference]: Finished difference Result 199 states and 462 transitions. [2021-06-12 19:51:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:51:31,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:31,450 INFO L225 Difference]: With dead ends: 199 [2021-06-12 19:51:31,451 INFO L226 Difference]: Without dead ends: 199 [2021-06-12 19:51:31,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:31,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-12 19:51:31,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 126. [2021-06-12 19:51:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.616) internal successors, (327), 125 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 327 transitions. [2021-06-12 19:51:31,453 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 327 transitions. Word has length 15 [2021-06-12 19:51:31,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:31,453 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 327 transitions. [2021-06-12 19:51:31,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 327 transitions. [2021-06-12 19:51:31,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:31,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:31,453 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:31,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-12 19:51:31,665 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 496149788, now seen corresponding path program 57 times [2021-06-12 19:51:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:31,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505774888] [2021-06-12 19:51:31,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:31,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:31,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505774888] [2021-06-12 19:51:31,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505774888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:31,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245929501] [2021-06-12 19:51:31,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:31,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:31,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:31,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:31,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:31,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:31,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:31,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:31,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,935 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:31,935 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:31,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:31,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:31,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245929501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:31,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:31,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:31,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684161140] [2021-06-12 19:51:31,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:31,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:31,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:31,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:31,955 INFO L87 Difference]: Start difference. First operand 126 states and 327 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:32,186 INFO L93 Difference]: Finished difference Result 187 states and 454 transitions. [2021-06-12 19:51:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:51:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:32,187 INFO L225 Difference]: With dead ends: 187 [2021-06-12 19:51:32,187 INFO L226 Difference]: Without dead ends: 187 [2021-06-12 19:51:32,187 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:32,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-12 19:51:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 128. [2021-06-12 19:51:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6141732283464565) internal successors, (332), 127 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 332 transitions. [2021-06-12 19:51:32,189 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 332 transitions. Word has length 15 [2021-06-12 19:51:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:32,189 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 332 transitions. [2021-06-12 19:51:32,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,189 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 332 transitions. [2021-06-12 19:51:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:32,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:32,190 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:32,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-12 19:51:32,405 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:32,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:32,405 INFO L82 PathProgramCache]: Analyzing trace with hash -993255208, now seen corresponding path program 58 times [2021-06-12 19:51:32,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:32,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783215875] [2021-06-12 19:51:32,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:32,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:32,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783215875] [2021-06-12 19:51:32,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783215875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:32,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646829698] [2021-06-12 19:51:32,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:32,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:32,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:32,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:32,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:32,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:32,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:32,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:32,621 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:32,622 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:32,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:32,623 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:32,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646829698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:32,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:32,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:32,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533994619] [2021-06-12 19:51:32,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:32,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:32,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:32,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:32,670 INFO L87 Difference]: Start difference. First operand 128 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:32,780 INFO L93 Difference]: Finished difference Result 170 states and 424 transitions. [2021-06-12 19:51:32,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:32,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:32,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:32,781 INFO L225 Difference]: With dead ends: 170 [2021-06-12 19:51:32,781 INFO L226 Difference]: Without dead ends: 170 [2021-06-12 19:51:32,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:32,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-06-12 19:51:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 128. [2021-06-12 19:51:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.6141732283464565) internal successors, (332), 127 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 332 transitions. [2021-06-12 19:51:32,783 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 332 transitions. Word has length 15 [2021-06-12 19:51:32,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:32,783 INFO L482 AbstractCegarLoop]: Abstraction has 128 states and 332 transitions. [2021-06-12 19:51:32,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:32,783 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 332 transitions. [2021-06-12 19:51:32,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:32,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:32,784 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:32,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-12 19:51:32,984 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:32,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1505045474, now seen corresponding path program 59 times [2021-06-12 19:51:32,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:32,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404087310] [2021-06-12 19:51:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:33,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404087310] [2021-06-12 19:51:33,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404087310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:33,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779967444] [2021-06-12 19:51:33,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:33,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:51:33,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:33,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:33,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:33,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:33,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:33,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:33,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:33,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,171 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:51:33,171 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:33,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,171 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:51:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:33,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779967444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:33,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:33,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:33,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067143384] [2021-06-12 19:51:33,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:33,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:33,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:33,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:33,195 INFO L87 Difference]: Start difference. First operand 128 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:33,359 INFO L93 Difference]: Finished difference Result 205 states and 480 transitions. [2021-06-12 19:51:33,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:51:33,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:33,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:33,369 INFO L225 Difference]: With dead ends: 205 [2021-06-12 19:51:33,369 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 19:51:33,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:51:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 19:51:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 140. [2021-06-12 19:51:33,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.697841726618705) internal successors, (375), 139 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:33,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 375 transitions. [2021-06-12 19:51:33,372 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 375 transitions. Word has length 15 [2021-06-12 19:51:33,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:33,372 INFO L482 AbstractCegarLoop]: Abstraction has 140 states and 375 transitions. [2021-06-12 19:51:33,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:33,372 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 375 transitions. [2021-06-12 19:51:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:33,372 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:33,372 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:33,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:33,589 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:33,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1870221114, now seen corresponding path program 60 times [2021-06-12 19:51:33,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:33,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138623311] [2021-06-12 19:51:33,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:33,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:33,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138623311] [2021-06-12 19:51:33,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138623311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:33,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435423652] [2021-06-12 19:51:33,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:33,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:33,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:33,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:33,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:33,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:33,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:33,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:33,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:33,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:33,770 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:33,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:33,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:33,804 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-12 19:51:33,805 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:33,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:33,805 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:51:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:33,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435423652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:33,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905366350] [2021-06-12 19:51:33,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:33,843 INFO L87 Difference]: Start difference. First operand 140 states and 375 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:34,118 INFO L93 Difference]: Finished difference Result 187 states and 444 transitions. [2021-06-12 19:51:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:51:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:34,119 INFO L225 Difference]: With dead ends: 187 [2021-06-12 19:51:34,119 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 19:51:34,119 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 19:51:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2021-06-12 19:51:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.652482269503546) internal successors, (374), 141 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 374 transitions. [2021-06-12 19:51:34,121 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 374 transitions. Word has length 15 [2021-06-12 19:51:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:34,121 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 374 transitions. [2021-06-12 19:51:34,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 374 transitions. [2021-06-12 19:51:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:34,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:34,122 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:34,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:34,337 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:34,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1497315076, now seen corresponding path program 61 times [2021-06-12 19:51:34,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:34,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115215369] [2021-06-12 19:51:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:34,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115215369] [2021-06-12 19:51:34,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115215369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:34,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449624743] [2021-06-12 19:51:34,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:34,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:34,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:34,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:34,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:34,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:34,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:34,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:34,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:34,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:34,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:34,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:34,522 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:34,556 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:34,556 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:34,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:34,557 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:34,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449624743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:34,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:34,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:34,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449492299] [2021-06-12 19:51:34,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:34,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:34,602 INFO L87 Difference]: Start difference. First operand 142 states and 374 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:34,890 INFO L93 Difference]: Finished difference Result 226 states and 506 transitions. [2021-06-12 19:51:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:51:34,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:34,891 INFO L225 Difference]: With dead ends: 226 [2021-06-12 19:51:34,891 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:51:34,891 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:34,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:51:34,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 145. [2021-06-12 19:51:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.6805555555555554) internal successors, (386), 144 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 386 transitions. [2021-06-12 19:51:34,893 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 386 transitions. Word has length 15 [2021-06-12 19:51:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:34,893 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 386 transitions. [2021-06-12 19:51:34,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 386 transitions. [2021-06-12 19:51:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:34,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:34,894 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:35,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-12 19:51:35,111 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash -695698848, now seen corresponding path program 62 times [2021-06-12 19:51:35,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:35,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611870137] [2021-06-12 19:51:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:35,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:35,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:35,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611870137] [2021-06-12 19:51:35,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611870137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:35,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348822290] [2021-06-12 19:51:35,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:51:35,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:35,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:35,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:35,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:35,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:35,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:35,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:35,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:35,277 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:35,305 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:35,306 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:35,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:35,306 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:35,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348822290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:35,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:35,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:35,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288492779] [2021-06-12 19:51:35,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:35,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:35,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:35,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:35,366 INFO L87 Difference]: Start difference. First operand 145 states and 386 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:35,790 INFO L93 Difference]: Finished difference Result 229 states and 520 transitions. [2021-06-12 19:51:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:51:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:35,792 INFO L225 Difference]: With dead ends: 229 [2021-06-12 19:51:35,792 INFO L226 Difference]: Without dead ends: 225 [2021-06-12 19:51:35,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 389.7ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:51:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-12 19:51:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 149. [2021-06-12 19:51:35,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.675675675675676) internal successors, (396), 148 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:35,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 396 transitions. [2021-06-12 19:51:35,794 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 396 transitions. Word has length 15 [2021-06-12 19:51:35,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:35,794 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 396 transitions. [2021-06-12 19:51:35,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:35,795 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 396 transitions. [2021-06-12 19:51:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:35,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:35,795 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:36,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:36,017 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1022644858, now seen corresponding path program 63 times [2021-06-12 19:51:36,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:36,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568137433] [2021-06-12 19:51:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:36,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:36,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568137433] [2021-06-12 19:51:36,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568137433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:36,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705447062] [2021-06-12 19:51:36,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:36,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:51:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:36,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:36,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:36,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:36,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:36,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:36,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:36,218 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:36,219 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:36,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:36,219 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705447062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:36,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:36,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:36,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090702659] [2021-06-12 19:51:36,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:36,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:36,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:36,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:36,265 INFO L87 Difference]: Start difference. First operand 149 states and 396 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:36,535 INFO L93 Difference]: Finished difference Result 215 states and 496 transitions. [2021-06-12 19:51:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:51:36,536 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:36,536 INFO L225 Difference]: With dead ends: 215 [2021-06-12 19:51:36,536 INFO L226 Difference]: Without dead ends: 215 [2021-06-12 19:51:36,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:51:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-12 19:51:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 146. [2021-06-12 19:51:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.6344827586206896) internal successors, (382), 145 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 382 transitions. [2021-06-12 19:51:36,539 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 382 transitions. Word has length 15 [2021-06-12 19:51:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:36,539 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 382 transitions. [2021-06-12 19:51:36,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 382 transitions. [2021-06-12 19:51:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:36,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:36,539 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:36,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable475,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:36,746 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:36,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1379198886, now seen corresponding path program 64 times [2021-06-12 19:51:36,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:36,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977281283] [2021-06-12 19:51:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:37,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:37,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977281283] [2021-06-12 19:51:37,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977281283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:37,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500276774] [2021-06-12 19:51:37,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:51:37,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:37,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:37,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:37,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:37,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:37,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:37,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:37,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:37,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:37,233 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:37,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:37,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:37,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:37,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:37,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:37,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:37,273 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:37,273 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:37,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:37,273 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:37,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500276774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:37,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:37,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:37,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767345196] [2021-06-12 19:51:37,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:37,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:37,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:37,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:37,332 INFO L87 Difference]: Start difference. First operand 146 states and 382 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:37,712 INFO L93 Difference]: Finished difference Result 199 states and 465 transitions. [2021-06-12 19:51:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:51:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:37,713 INFO L225 Difference]: With dead ends: 199 [2021-06-12 19:51:37,713 INFO L226 Difference]: Without dead ends: 195 [2021-06-12 19:51:37,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 540.9ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:51:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-06-12 19:51:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2021-06-12 19:51:37,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.610738255033557) internal successors, (389), 149 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2021-06-12 19:51:37,715 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 15 [2021-06-12 19:51:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:37,715 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2021-06-12 19:51:37,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2021-06-12 19:51:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:37,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:37,716 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:37,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-06-12 19:51:37,932 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash 349848448, now seen corresponding path program 65 times [2021-06-12 19:51:37,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:37,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022611663] [2021-06-12 19:51:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:37,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:37,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:37,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022611663] [2021-06-12 19:51:37,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022611663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:37,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24663693] [2021-06-12 19:51:37,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:38,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:38,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:38,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:38,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:38,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:38,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:38,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:38,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:38,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:38,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:38,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:38,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:38,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:38,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:38,144 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,173 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:51:38,173 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:38,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:38,174 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:51:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:38,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24663693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:38,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:38,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:38,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247840361] [2021-06-12 19:51:38,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:38,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:38,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:38,199 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:38,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:38,489 INFO L93 Difference]: Finished difference Result 174 states and 424 transitions. [2021-06-12 19:51:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:51:38,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:38,490 INFO L225 Difference]: With dead ends: 174 [2021-06-12 19:51:38,490 INFO L226 Difference]: Without dead ends: 166 [2021-06-12 19:51:38,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-06-12 19:51:38,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 150. [2021-06-12 19:51:38,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.5838926174496644) internal successors, (385), 149 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:38,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 385 transitions. [2021-06-12 19:51:38,492 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 385 transitions. Word has length 15 [2021-06-12 19:51:38,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:38,492 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 385 transitions. [2021-06-12 19:51:38,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 385 transitions. [2021-06-12 19:51:38,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:38,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:38,492 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:38,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-12 19:51:38,706 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2117593850, now seen corresponding path program 66 times [2021-06-12 19:51:38,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:38,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673278841] [2021-06-12 19:51:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:38,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:38,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673278841] [2021-06-12 19:51:38,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673278841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:38,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109909553] [2021-06-12 19:51:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:38,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:51:38,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:38,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:38,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:38,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:38,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:38,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:38,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:38,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:38,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,904 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:38,904 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:38,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:38,905 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:38,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:38,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109909553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:38,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:38,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:38,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671073624] [2021-06-12 19:51:38,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:38,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:38,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:38,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:38,923 INFO L87 Difference]: Start difference. First operand 150 states and 385 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:39,074 INFO L93 Difference]: Finished difference Result 211 states and 497 transitions. [2021-06-12 19:51:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:39,075 INFO L225 Difference]: With dead ends: 211 [2021-06-12 19:51:39,075 INFO L226 Difference]: Without dead ends: 211 [2021-06-12 19:51:39,076 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-06-12 19:51:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 151. [2021-06-12 19:51:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.5933333333333333) internal successors, (389), 150 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 389 transitions. [2021-06-12 19:51:39,078 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 389 transitions. Word has length 15 [2021-06-12 19:51:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:39,078 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 389 transitions. [2021-06-12 19:51:39,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:39,078 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 389 transitions. [2021-06-12 19:51:39,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:39,078 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:39,078 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:39,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:39,294 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:39,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:39,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1913634692, now seen corresponding path program 67 times [2021-06-12 19:51:39,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:39,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371711072] [2021-06-12 19:51:39,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:39,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:39,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371711072] [2021-06-12 19:51:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371711072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:39,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458104645] [2021-06-12 19:51:39,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:39,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:39,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:39,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:39,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:39,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:39,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:39,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:39,465 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:39,497 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:39,497 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:39,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:39,498 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:39,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458104645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:39,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:39,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:39,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269072081] [2021-06-12 19:51:39,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:39,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:39,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:39,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:39,542 INFO L87 Difference]: Start difference. First operand 151 states and 389 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:39,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:39,676 INFO L93 Difference]: Finished difference Result 214 states and 495 transitions. [2021-06-12 19:51:39,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:51:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:39,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:39,677 INFO L225 Difference]: With dead ends: 214 [2021-06-12 19:51:39,677 INFO L226 Difference]: Without dead ends: 214 [2021-06-12 19:51:39,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:51:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-12 19:51:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-06-12 19:51:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.632258064516129) internal successors, (408), 155 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 408 transitions. [2021-06-12 19:51:39,689 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 408 transitions. Word has length 15 [2021-06-12 19:51:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:39,689 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 408 transitions. [2021-06-12 19:51:39,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:39,690 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 408 transitions. [2021-06-12 19:51:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:39,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:39,690 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:39,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:39,894 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1112018464, now seen corresponding path program 68 times [2021-06-12 19:51:39,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:39,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915348556] [2021-06-12 19:51:39,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:39,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:39,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915348556] [2021-06-12 19:51:39,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915348556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:39,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748197392] [2021-06-12 19:51:39,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:39,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:39,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:40,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:40,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:40,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:40,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:40,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:40,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:40,100 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:40,100 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:40,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:40,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:40,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748197392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:40,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:40,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:40,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556272152] [2021-06-12 19:51:40,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:40,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:40,181 INFO L87 Difference]: Start difference. First operand 156 states and 408 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:40,682 INFO L93 Difference]: Finished difference Result 220 states and 506 transitions. [2021-06-12 19:51:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:51:40,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:40,683 INFO L225 Difference]: With dead ends: 220 [2021-06-12 19:51:40,684 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:51:40,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:51:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:51:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 159. [2021-06-12 19:51:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.632911392405063) internal successors, (416), 158 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 416 transitions. [2021-06-12 19:51:40,686 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 416 transitions. Word has length 15 [2021-06-12 19:51:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:40,686 INFO L482 AbstractCegarLoop]: Abstraction has 159 states and 416 transitions. [2021-06-12 19:51:40,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 416 transitions. [2021-06-12 19:51:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:40,686 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:40,686 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:40,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-12 19:51:40,887 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:40,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:40,887 INFO L82 PathProgramCache]: Analyzing trace with hash 606325242, now seen corresponding path program 69 times [2021-06-12 19:51:40,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:40,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987981562] [2021-06-12 19:51:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:40,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987981562] [2021-06-12 19:51:40,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987981562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36089539] [2021-06-12 19:51:40,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:40,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:51:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:40,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:41,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:41,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:41,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:41,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:41,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:41,057 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:41,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:41,060 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:41,093 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:41,094 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:41,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:41,094 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:41,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36089539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:41,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:41,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:41,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690471530] [2021-06-12 19:51:41,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:41,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:41,137 INFO L87 Difference]: Start difference. First operand 159 states and 416 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:41,438 INFO L93 Difference]: Finished difference Result 206 states and 487 transitions. [2021-06-12 19:51:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:51:41,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:41,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:41,447 INFO L225 Difference]: With dead ends: 206 [2021-06-12 19:51:41,447 INFO L226 Difference]: Without dead ends: 206 [2021-06-12 19:51:41,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:51:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-06-12 19:51:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 156. [2021-06-12 19:51:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.6) internal successors, (403), 155 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 403 transitions. [2021-06-12 19:51:41,449 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 403 transitions. Word has length 15 [2021-06-12 19:51:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:41,449 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 403 transitions. [2021-06-12 19:51:41,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 403 transitions. [2021-06-12 19:51:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:41,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:41,450 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:41,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable504,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:41,654 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:41,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:41,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1104288066, now seen corresponding path program 70 times [2021-06-12 19:51:41,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:41,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194121985] [2021-06-12 19:51:41,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:41,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194121985] [2021-06-12 19:51:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194121985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965496306] [2021-06-12 19:51:41,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:41,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:41,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:41,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:41,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:41,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:41,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:41,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:41,872 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:41,872 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:41,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:41,873 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:41,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965496306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:41,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:41,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:41,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964161097] [2021-06-12 19:51:41,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:41,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:41,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:41,891 INFO L87 Difference]: Start difference. First operand 156 states and 403 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:42,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:42,125 INFO L93 Difference]: Finished difference Result 193 states and 478 transitions. [2021-06-12 19:51:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:51:42,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:42,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:42,125 INFO L225 Difference]: With dead ends: 193 [2021-06-12 19:51:42,126 INFO L226 Difference]: Without dead ends: 193 [2021-06-12 19:51:42,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-12 19:51:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2021-06-12 19:51:42,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.605095541401274) internal successors, (409), 157 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:42,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 409 transitions. [2021-06-12 19:51:42,128 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 409 transitions. Word has length 15 [2021-06-12 19:51:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:42,128 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 409 transitions. [2021-06-12 19:51:42,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 409 transitions. [2021-06-12 19:51:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:42,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:42,128 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:42,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:42,344 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1701274234, now seen corresponding path program 71 times [2021-06-12 19:51:42,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:42,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047389528] [2021-06-12 19:51:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:42,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047389528] [2021-06-12 19:51:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047389528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875983507] [2021-06-12 19:51:42,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:42,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:42,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:42,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:42,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:42,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:42,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:42,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:42,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:42,556 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:42,556 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:42,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:42,557 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:42,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875983507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:42,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:42,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171596837] [2021-06-12 19:51:42,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:42,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:42,576 INFO L87 Difference]: Start difference. First operand 158 states and 409 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:42,709 INFO L93 Difference]: Finished difference Result 187 states and 466 transitions. [2021-06-12 19:51:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:42,710 INFO L225 Difference]: With dead ends: 187 [2021-06-12 19:51:42,710 INFO L226 Difference]: Without dead ends: 187 [2021-06-12 19:51:42,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-06-12 19:51:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 158. [2021-06-12 19:51:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.605095541401274) internal successors, (409), 157 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 409 transitions. [2021-06-12 19:51:42,713 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 409 transitions. Word has length 15 [2021-06-12 19:51:42,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:42,713 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 409 transitions. [2021-06-12 19:51:42,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 409 transitions. [2021-06-12 19:51:42,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:42,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:42,714 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:42,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:42,931 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash 202352474, now seen corresponding path program 72 times [2021-06-12 19:51:42,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:42,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681416819] [2021-06-12 19:51:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:42,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:42,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681416819] [2021-06-12 19:51:42,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681416819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:42,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841410963] [2021-06-12 19:51:42,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:43,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:43,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:43,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:43,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:43,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:43,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:43,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,124 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:51:43,124 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:43,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:51:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841410963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:43,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:43,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033805813] [2021-06-12 19:51:43,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:43,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:43,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:43,146 INFO L87 Difference]: Start difference. First operand 158 states and 409 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:43,306 INFO L93 Difference]: Finished difference Result 231 states and 540 transitions. [2021-06-12 19:51:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:43,307 INFO L225 Difference]: With dead ends: 231 [2021-06-12 19:51:43,307 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:51:43,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:43,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:51:43,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 171. [2021-06-12 19:51:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6470588235294117) internal successors, (450), 170 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 450 transitions. [2021-06-12 19:51:43,310 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 450 transitions. Word has length 15 [2021-06-12 19:51:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:43,310 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 450 transitions. [2021-06-12 19:51:43,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 450 transitions. [2021-06-12 19:51:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:43,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:43,311 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:43,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-12 19:51:43,525 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:43,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:43,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1756401598, now seen corresponding path program 73 times [2021-06-12 19:51:43,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:43,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494879669] [2021-06-12 19:51:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:43,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494879669] [2021-06-12 19:51:43,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494879669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:43,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48992781] [2021-06-12 19:51:43,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:43,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:43,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:43,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:43,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:43,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:43,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:43,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:43,933 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:43,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:43,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:43,965 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-12 19:51:43,965 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:43,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:43,966 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:51:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:43,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48992781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:43,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:43,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:43,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649047909] [2021-06-12 19:51:43,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:43,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:43,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:43,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:43,995 INFO L87 Difference]: Start difference. First operand 171 states and 450 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:44,305 INFO L93 Difference]: Finished difference Result 216 states and 508 transitions. [2021-06-12 19:51:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:51:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:44,306 INFO L225 Difference]: With dead ends: 216 [2021-06-12 19:51:44,306 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:51:44,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:51:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:51:44,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 174. [2021-06-12 19:51:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6184971098265897) internal successors, (453), 173 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 453 transitions. [2021-06-12 19:51:44,309 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 453 transitions. Word has length 15 [2021-06-12 19:51:44,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:44,309 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 453 transitions. [2021-06-12 19:51:44,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:44,309 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 453 transitions. [2021-06-12 19:51:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:44,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:44,309 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:44,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-12 19:51:44,510 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 441994812, now seen corresponding path program 74 times [2021-06-12 19:51:44,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:44,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130521030] [2021-06-12 19:51:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:44,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:44,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130521030] [2021-06-12 19:51:44,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130521030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:44,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585727944] [2021-06-12 19:51:44,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:44,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:44,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:44,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:44,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:44,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:44,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:44,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:44,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:44,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:44,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:44,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:44,749 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:51:44,749 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:44,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:44,750 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:51:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:44,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585727944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:44,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:44,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882863948] [2021-06-12 19:51:44,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:44,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:44,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:44,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:44,770 INFO L87 Difference]: Start difference. First operand 174 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:45,190 INFO L93 Difference]: Finished difference Result 248 states and 574 transitions. [2021-06-12 19:51:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:51:45,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:45,191 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:51:45,191 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:51:45,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:51:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:51:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 172. [2021-06-12 19:51:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.6374269005847952) internal successors, (451), 171 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 451 transitions. [2021-06-12 19:51:45,194 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 451 transitions. Word has length 15 [2021-06-12 19:51:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:45,194 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 451 transitions. [2021-06-12 19:51:45,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 451 transitions. [2021-06-12 19:51:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:45,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:45,195 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:45,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-12 19:51:45,409 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:45,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:45,409 INFO L82 PathProgramCache]: Analyzing trace with hash -477705896, now seen corresponding path program 75 times [2021-06-12 19:51:45,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:45,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641008215] [2021-06-12 19:51:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:45,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:45,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641008215] [2021-06-12 19:51:45,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641008215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:45,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336597053] [2021-06-12 19:51:45,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:45,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 19:51:45,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:45,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:45,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:45,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:45,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:45,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:45,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:45,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:45,608 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:45,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:45,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:45,642 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-12 19:51:45,642 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:45,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:45,643 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:51:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:45,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336597053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:45,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:45,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:45,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957271400] [2021-06-12 19:51:45,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:45,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:45,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:45,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:45,673 INFO L87 Difference]: Start difference. First operand 172 states and 451 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:46,124 INFO L93 Difference]: Finished difference Result 217 states and 515 transitions. [2021-06-12 19:51:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:51:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:46,125 INFO L225 Difference]: With dead ends: 217 [2021-06-12 19:51:46,125 INFO L226 Difference]: Without dead ends: 213 [2021-06-12 19:51:46,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:51:46,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-12 19:51:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 173. [2021-06-12 19:51:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.633720930232558) internal successors, (453), 172 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:46,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 453 transitions. [2021-06-12 19:51:46,128 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 453 transitions. Word has length 15 [2021-06-12 19:51:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:46,128 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 453 transitions. [2021-06-12 19:51:46,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 453 transitions. [2021-06-12 19:51:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:46,128 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:46,128 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:46,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:46,344 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:46,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 449725210, now seen corresponding path program 76 times [2021-06-12 19:51:46,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:46,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136139729] [2021-06-12 19:51:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:46,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:46,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136139729] [2021-06-12 19:51:46,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136139729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:46,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813588713] [2021-06-12 19:51:46,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:46,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:46,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:46,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:46,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:46,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:46,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:46,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:46,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:46,555 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:46,555 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:46,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:46,556 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:46,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813588713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:46,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:46,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:46,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707244991] [2021-06-12 19:51:46,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:46,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:46,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:46,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:46,603 INFO L87 Difference]: Start difference. First operand 173 states and 453 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:46,945 INFO L93 Difference]: Finished difference Result 262 states and 580 transitions. [2021-06-12 19:51:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:51:46,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:46,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:46,946 INFO L225 Difference]: With dead ends: 262 [2021-06-12 19:51:46,946 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 19:51:46,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:51:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 19:51:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 170. [2021-06-12 19:51:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.6272189349112427) internal successors, (444), 169 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 444 transitions. [2021-06-12 19:51:46,949 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 444 transitions. Word has length 15 [2021-06-12 19:51:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:46,949 INFO L482 AbstractCegarLoop]: Abstraction has 170 states and 444 transitions. [2021-06-12 19:51:46,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 444 transitions. [2021-06-12 19:51:46,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:46,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:46,949 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:47,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:47,162 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:47,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1251341438, now seen corresponding path program 77 times [2021-06-12 19:51:47,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:47,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120331239] [2021-06-12 19:51:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:47,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:47,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120331239] [2021-06-12 19:51:47,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120331239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:47,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552637979] [2021-06-12 19:51:47,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:47,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:47,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:47,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:47,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:47,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:47,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:47,355 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:47,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:47,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:47,390 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:47,390 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:47,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:47,391 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:47,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:47,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552637979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:47,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:47,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:47,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663133931] [2021-06-12 19:51:47,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:47,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:47,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:47,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:47,472 INFO L87 Difference]: Start difference. First operand 170 states and 444 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:47,909 INFO L93 Difference]: Finished difference Result 235 states and 540 transitions. [2021-06-12 19:51:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:51:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:47,910 INFO L225 Difference]: With dead ends: 235 [2021-06-12 19:51:47,910 INFO L226 Difference]: Without dead ends: 231 [2021-06-12 19:51:47,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:51:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-06-12 19:51:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 174. [2021-06-12 19:51:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.6300578034682083) internal successors, (455), 173 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 455 transitions. [2021-06-12 19:51:47,913 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 455 transitions. Word has length 15 [2021-06-12 19:51:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:47,913 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 455 transitions. [2021-06-12 19:51:47,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:47,913 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 455 transitions. [2021-06-12 19:51:47,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:47,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:47,913 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:48,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-12 19:51:48,124 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:48,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:48,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1325282152, now seen corresponding path program 78 times [2021-06-12 19:51:48,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:48,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389745882] [2021-06-12 19:51:48,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:48,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389745882] [2021-06-12 19:51:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389745882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417964092] [2021-06-12 19:51:48,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:48,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:48,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:48,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:48,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:48,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:48,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:48,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:48,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:48,326 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:48,359 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:48,360 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:48,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:48,360 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:48,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417964092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:48,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:48,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:48,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333892712] [2021-06-12 19:51:48,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:48,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:48,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:48,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:48,407 INFO L87 Difference]: Start difference. First operand 174 states and 455 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:48,667 INFO L93 Difference]: Finished difference Result 226 states and 532 transitions. [2021-06-12 19:51:48,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:48,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:48,668 INFO L225 Difference]: With dead ends: 226 [2021-06-12 19:51:48,668 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 19:51:48,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:48,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 19:51:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 172. [2021-06-12 19:51:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.6140350877192984) internal successors, (447), 171 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 447 transitions. [2021-06-12 19:51:48,670 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 447 transitions. Word has length 15 [2021-06-12 19:51:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:48,671 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 447 transitions. [2021-06-12 19:51:48,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 447 transitions. [2021-06-12 19:51:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:48,671 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:48,671 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:48,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:48,872 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1164635520, now seen corresponding path program 79 times [2021-06-12 19:51:48,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:48,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662933808] [2021-06-12 19:51:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:51:48,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:48,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662933808] [2021-06-12 19:51:48,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662933808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:48,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962488447] [2021-06-12 19:51:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:49,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:49,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:49,028 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:49,032 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:49,035 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,066 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:49,066 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:49,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:49,067 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:49,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962488447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:49,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:49,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:51:49,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659615700] [2021-06-12 19:51:49,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:49,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:49,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:49,125 INFO L87 Difference]: Start difference. First operand 172 states and 447 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:49,423 INFO L93 Difference]: Finished difference Result 195 states and 481 transitions. [2021-06-12 19:51:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:51:49,424 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:49,424 INFO L225 Difference]: With dead ends: 195 [2021-06-12 19:51:49,424 INFO L226 Difference]: Without dead ends: 191 [2021-06-12 19:51:49,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:51:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-06-12 19:51:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 174. [2021-06-12 19:51:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.61271676300578) internal successors, (452), 173 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 452 transitions. [2021-06-12 19:51:49,427 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 452 transitions. Word has length 15 [2021-06-12 19:51:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:49,427 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 452 transitions. [2021-06-12 19:51:49,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 452 transitions. [2021-06-12 19:51:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:49,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:49,427 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:49,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-12 19:51:49,628 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:49,628 INFO L82 PathProgramCache]: Analyzing trace with hash 33405594, now seen corresponding path program 80 times [2021-06-12 19:51:49,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:49,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151127963] [2021-06-12 19:51:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:49,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:49,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151127963] [2021-06-12 19:51:49,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151127963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:49,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168517931] [2021-06-12 19:51:49,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:49,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:49,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:49,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:49,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:49,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:49,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:49,815 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:49,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:49,818 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:49,849 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:49,849 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:49,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:49,850 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:49,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:49,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168517931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:49,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:49,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:51:49,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622969174] [2021-06-12 19:51:49,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:49,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:49,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:49,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:49,895 INFO L87 Difference]: Start difference. First operand 174 states and 452 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:50,109 INFO L93 Difference]: Finished difference Result 269 states and 611 transitions. [2021-06-12 19:51:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:50,110 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:51:50,110 INFO L226 Difference]: Without dead ends: 269 [2021-06-12 19:51:50,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:51:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-12 19:51:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 182. [2021-06-12 19:51:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.657458563535912) internal successors, (481), 181 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 481 transitions. [2021-06-12 19:51:50,113 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 481 transitions. Word has length 15 [2021-06-12 19:51:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:50,113 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 481 transitions. [2021-06-12 19:51:50,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 481 transitions. [2021-06-12 19:51:50,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:50,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:50,113 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:50,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-12 19:51:50,314 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:50,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:50,314 INFO L82 PathProgramCache]: Analyzing trace with hash 835021822, now seen corresponding path program 81 times [2021-06-12 19:51:50,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:50,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459402483] [2021-06-12 19:51:50,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:50,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:50,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459402483] [2021-06-12 19:51:50,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459402483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:50,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738082150] [2021-06-12 19:51:50,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:50,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:50,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:50,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:50,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:50,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:50,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:50,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:50,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:50,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:50,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:50,475 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:50,506 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:50,507 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:50,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:50,507 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:50,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738082150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:50,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:50,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:51:50,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887977351] [2021-06-12 19:51:50,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:50,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:50,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:50,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:50,570 INFO L87 Difference]: Start difference. First operand 182 states and 481 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:50,963 INFO L93 Difference]: Finished difference Result 292 states and 678 transitions. [2021-06-12 19:51:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:51:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:50,965 INFO L225 Difference]: With dead ends: 292 [2021-06-12 19:51:50,965 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:51:50,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:51:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:51:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 201. [2021-06-12 19:51:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.72) internal successors, (544), 200 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 544 transitions. [2021-06-12 19:51:50,967 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 544 transitions. Word has length 15 [2021-06-12 19:51:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:50,968 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 544 transitions. [2021-06-12 19:51:50,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:50,968 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 544 transitions. [2021-06-12 19:51:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:50,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:50,968 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:51,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-12 19:51:51,171 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:51,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1741601768, now seen corresponding path program 82 times [2021-06-12 19:51:51,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:51,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719639038] [2021-06-12 19:51:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:51,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:51,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719639038] [2021-06-12 19:51:51,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719639038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:51,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613920526] [2021-06-12 19:51:51,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:51,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:51,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:51,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:51,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:51,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:51,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:51,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:51,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:51,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:51,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:51,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:51,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:51,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:51,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:51,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:51,346 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:51,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:51,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:51,349 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:51,380 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:51,380 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:51,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:51,381 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:51,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613920526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:51,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:51,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:51:51,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814337605] [2021-06-12 19:51:51,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:51,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:51,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:51,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:51,424 INFO L87 Difference]: Start difference. First operand 201 states and 544 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:51,656 INFO L93 Difference]: Finished difference Result 272 states and 647 transitions. [2021-06-12 19:51:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:51:51,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:51,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:51,657 INFO L225 Difference]: With dead ends: 272 [2021-06-12 19:51:51,657 INFO L226 Difference]: Without dead ends: 272 [2021-06-12 19:51:51,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:51:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-12 19:51:51,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 196. [2021-06-12 19:51:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.687179487179487) internal successors, (524), 195 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 524 transitions. [2021-06-12 19:51:51,660 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 524 transitions. Word has length 15 [2021-06-12 19:51:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:51,660 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 524 transitions. [2021-06-12 19:51:51,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 524 transitions. [2021-06-12 19:51:51,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:51,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:51,661 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:51,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-12 19:51:51,877 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash 842752220, now seen corresponding path program 83 times [2021-06-12 19:51:51,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:51,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140164282] [2021-06-12 19:51:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:51,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140164282] [2021-06-12 19:51:51,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140164282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:51,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037408315] [2021-06-12 19:51:51,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:51,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:51,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:51,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:52,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:52,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:52,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,082 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:52,083 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:52,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,083 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:52,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037408315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:52,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:52,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:51:52,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898062052] [2021-06-12 19:51:52,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:52,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:52,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:52,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:52,103 INFO L87 Difference]: Start difference. First operand 196 states and 524 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:52,249 INFO L93 Difference]: Finished difference Result 273 states and 652 transitions. [2021-06-12 19:51:52,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:52,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:52,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:52,250 INFO L225 Difference]: With dead ends: 273 [2021-06-12 19:51:52,250 INFO L226 Difference]: Without dead ends: 273 [2021-06-12 19:51:52,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-06-12 19:51:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 196. [2021-06-12 19:51:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.687179487179487) internal successors, (524), 195 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 524 transitions. [2021-06-12 19:51:52,253 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 524 transitions. Word has length 15 [2021-06-12 19:51:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:52,253 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 524 transitions. [2021-06-12 19:51:52,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:52,253 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 524 transitions. [2021-06-12 19:51:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:52,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:52,253 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:52,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:52,469 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:52,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:52,470 INFO L82 PathProgramCache]: Analyzing trace with hash 12399386, now seen corresponding path program 84 times [2021-06-12 19:51:52,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:52,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317083004] [2021-06-12 19:51:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:52,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:52,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317083004] [2021-06-12 19:51:52,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317083004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:52,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414357261] [2021-06-12 19:51:52,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:52,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:51:52,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:52,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:52,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:52,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:52,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:52,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:52,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:52,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:52,699 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:52,699 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:52,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:52,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:52,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414357261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:52,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:52,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:52,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609193471] [2021-06-12 19:51:52,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:52,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:52,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:52,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:52,745 INFO L87 Difference]: Start difference. First operand 196 states and 524 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:52,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:52,930 INFO L93 Difference]: Finished difference Result 276 states and 670 transitions. [2021-06-12 19:51:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:51:52,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:52,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:52,932 INFO L225 Difference]: With dead ends: 276 [2021-06-12 19:51:52,932 INFO L226 Difference]: Without dead ends: 276 [2021-06-12 19:51:52,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:51:52,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-12 19:51:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 206. [2021-06-12 19:51:52,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.7365853658536587) internal successors, (561), 205 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 561 transitions. [2021-06-12 19:51:52,934 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 561 transitions. Word has length 15 [2021-06-12 19:51:52,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:52,935 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 561 transitions. [2021-06-12 19:51:52,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:52,935 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 561 transitions. [2021-06-12 19:51:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:52,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:52,935 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:53,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:53,135 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 814015614, now seen corresponding path program 85 times [2021-06-12 19:51:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:53,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197703077] [2021-06-12 19:51:53,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:53,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:53,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197703077] [2021-06-12 19:51:53,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197703077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:53,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154714141] [2021-06-12 19:51:53,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:53,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:53,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:53,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:53,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:53,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:53,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:53,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:53,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:53,353 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:53,354 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:53,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:53,354 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154714141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:53,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:53,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807462230] [2021-06-12 19:51:53,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:53,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:53,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:53,417 INFO L87 Difference]: Start difference. First operand 206 states and 561 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:53,960 INFO L93 Difference]: Finished difference Result 287 states and 687 transitions. [2021-06-12 19:51:53,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:51:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:53,961 INFO L225 Difference]: With dead ends: 287 [2021-06-12 19:51:53,961 INFO L226 Difference]: Without dead ends: 279 [2021-06-12 19:51:53,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:51:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-12 19:51:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 210. [2021-06-12 19:51:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.736842105263158) internal successors, (572), 209 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 572 transitions. [2021-06-12 19:51:53,964 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 572 transitions. Word has length 15 [2021-06-12 19:51:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:53,964 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 572 transitions. [2021-06-12 19:51:53,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:53,964 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 572 transitions. [2021-06-12 19:51:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:53,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:53,965 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:54,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:54,165 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1762607976, now seen corresponding path program 86 times [2021-06-12 19:51:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:54,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25933134] [2021-06-12 19:51:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:54,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:54,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25933134] [2021-06-12 19:51:54,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25933134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:54,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45844937] [2021-06-12 19:51:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:54,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:54,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:54,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:54,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:54,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:54,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:54,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:54,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:54,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:54,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:54,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:54,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:54,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:54,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:54,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:54,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:54,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:54,383 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:51:54,383 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:54,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:51:54,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:51:54,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:54,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45844937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:54,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:54,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:54,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131248613] [2021-06-12 19:51:54,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:54,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:54,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:54,430 INFO L87 Difference]: Start difference. First operand 210 states and 572 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:54,825 INFO L93 Difference]: Finished difference Result 285 states and 714 transitions. [2021-06-12 19:51:54,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:51:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:54,826 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:51:54,826 INFO L226 Difference]: Without dead ends: 285 [2021-06-12 19:51:54,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:51:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-12 19:51:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 221. [2021-06-12 19:51:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.768181818181818) internal successors, (609), 220 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 609 transitions. [2021-06-12 19:51:54,829 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 609 transitions. Word has length 15 [2021-06-12 19:51:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:54,829 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 609 transitions. [2021-06-12 19:51:54,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 609 transitions. [2021-06-12 19:51:54,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:54,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:54,830 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:55,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:55,034 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:55,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:55,034 INFO L82 PathProgramCache]: Analyzing trace with hash 821746012, now seen corresponding path program 87 times [2021-06-12 19:51:55,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:55,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807590373] [2021-06-12 19:51:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:55,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:55,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807590373] [2021-06-12 19:51:55,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807590373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:55,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839500288] [2021-06-12 19:51:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:55,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:55,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:55,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:55,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:55,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:55,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:55,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:55,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:55,271 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:55,271 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:55,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:55,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839500288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:55,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:55,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:55,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555035783] [2021-06-12 19:51:55,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:55,291 INFO L87 Difference]: Start difference. First operand 221 states and 609 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:55,697 INFO L93 Difference]: Finished difference Result 317 states and 763 transitions. [2021-06-12 19:51:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:51:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:55,698 INFO L225 Difference]: With dead ends: 317 [2021-06-12 19:51:55,698 INFO L226 Difference]: Without dead ends: 317 [2021-06-12 19:51:55,698 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 362.4ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:51:55,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-12 19:51:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 216. [2021-06-12 19:51:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-06-12 19:51:55,701 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-06-12 19:51:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:55,701 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-06-12 19:51:55,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-06-12 19:51:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:55,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:55,702 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:55,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-12 19:51:55,918 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:55,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:55,919 INFO L82 PathProgramCache]: Analyzing trace with hash -667658984, now seen corresponding path program 88 times [2021-06-12 19:51:55,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:55,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859183189] [2021-06-12 19:51:55,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:55,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:55,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859183189] [2021-06-12 19:51:55,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859183189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:55,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358299329] [2021-06-12 19:51:55,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:56,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:51:56,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:56,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:56,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,126 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:56,126 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:56,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,131 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358299329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:56,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:56,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:51:56,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843069651] [2021-06-12 19:51:56,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:51:56,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:56,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:51:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:56,150 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:56,321 INFO L93 Difference]: Finished difference Result 282 states and 694 transitions. [2021-06-12 19:51:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:56,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:56,322 INFO L225 Difference]: With dead ends: 282 [2021-06-12 19:51:56,322 INFO L226 Difference]: Without dead ends: 282 [2021-06-12 19:51:56,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-12 19:51:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 216. [2021-06-12 19:51:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:56,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-06-12 19:51:56,325 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-06-12 19:51:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:56,325 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-06-12 19:51:56,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:56,325 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-06-12 19:51:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:56,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:56,325 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:56,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable579,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:56,542 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:56,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:56,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1814621922, now seen corresponding path program 89 times [2021-06-12 19:51:56,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:56,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561452119] [2021-06-12 19:51:56,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:56,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:56,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561452119] [2021-06-12 19:51:56,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561452119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:56,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199812697] [2021-06-12 19:51:56,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:56,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:51:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:56,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:56,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:56,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:56,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,724 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 19:51:56,724 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:56,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:56,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 19:51:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:56,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199812697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:56,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:56,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:51:56,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209323139] [2021-06-12 19:51:56,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:56,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:56,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:56,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:56,742 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:56,861 INFO L93 Difference]: Finished difference Result 285 states and 751 transitions. [2021-06-12 19:51:56,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:56,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:56,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:56,862 INFO L225 Difference]: With dead ends: 285 [2021-06-12 19:51:56,862 INFO L226 Difference]: Without dead ends: 285 [2021-06-12 19:51:56,862 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:51:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-12 19:51:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 215. [2021-06-12 19:51:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.7523364485981308) internal successors, (589), 214 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 589 transitions. [2021-06-12 19:51:56,864 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 589 transitions. Word has length 15 [2021-06-12 19:51:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:56,865 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 589 transitions. [2021-06-12 19:51:56,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 589 transitions. [2021-06-12 19:51:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:56,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:56,865 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:57,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:57,065 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:57,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1256099514, now seen corresponding path program 90 times [2021-06-12 19:51:57,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:57,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172591275] [2021-06-12 19:51:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:57,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172591275] [2021-06-12 19:51:57,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172591275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:57,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489672317] [2021-06-12 19:51:57,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:57,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:51:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:57,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:57,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:57,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:57,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:57,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:57,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:57,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:57,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:57,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:57,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:57,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:57,294 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:51:57,294 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:57,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:57,297 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:57,318 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-12 19:51:57,318 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:57,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:57,319 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 19:51:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:57,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489672317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:57,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:57,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:51:57,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701619404] [2021-06-12 19:51:57,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:51:57,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:51:57,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:51:57,344 INFO L87 Difference]: Start difference. First operand 215 states and 589 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:57,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:57,612 INFO L93 Difference]: Finished difference Result 282 states and 741 transitions. [2021-06-12 19:51:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:51:57,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:57,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:57,613 INFO L225 Difference]: With dead ends: 282 [2021-06-12 19:51:57,613 INFO L226 Difference]: Without dead ends: 278 [2021-06-12 19:51:57,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:51:57,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-12 19:51:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 215. [2021-06-12 19:51:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.7476635514018692) internal successors, (588), 214 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 588 transitions. [2021-06-12 19:51:57,615 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 588 transitions. Word has length 15 [2021-06-12 19:51:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:57,615 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 588 transitions. [2021-06-12 19:51:57,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 588 transitions. [2021-06-12 19:51:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:57,616 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:57,616 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:57,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:57,816 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash 237280192, now seen corresponding path program 91 times [2021-06-12 19:51:57,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:57,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751231002] [2021-06-12 19:51:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:57,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:57,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751231002] [2021-06-12 19:51:57,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751231002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:57,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192478357] [2021-06-12 19:51:57,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:58,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:58,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:58,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:58,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:58,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:58,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,069 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:58,069 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:58,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:58,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192478357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:58,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:58,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:58,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616989614] [2021-06-12 19:51:58,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:58,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:58,089 INFO L87 Difference]: Start difference. First operand 215 states and 588 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:58,177 INFO L93 Difference]: Finished difference Result 286 states and 753 transitions. [2021-06-12 19:51:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:51:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:58,178 INFO L225 Difference]: With dead ends: 286 [2021-06-12 19:51:58,178 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:51:58,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:51:58,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 216. [2021-06-12 19:51:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.7488372093023257) internal successors, (591), 215 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 591 transitions. [2021-06-12 19:51:58,181 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 591 transitions. Word has length 15 [2021-06-12 19:51:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:58,181 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 591 transitions. [2021-06-12 19:51:58,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 591 transitions. [2021-06-12 19:51:58,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:58,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:58,181 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:58,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:58,382 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:58,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:58,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1791329316, now seen corresponding path program 92 times [2021-06-12 19:51:58,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:58,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191463435] [2021-06-12 19:51:58,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:58,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:58,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:58,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191463435] [2021-06-12 19:51:58,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191463435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424124167] [2021-06-12 19:51:58,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:58,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:51:58,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:58,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:58,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:58,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:58,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:58,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:58,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:58,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:58,599 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:51:58,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:51:58,607 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:58,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:51:58,610 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:58,644 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:51:58,644 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:58,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:51:58,645 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:51:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:58,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424124167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:58,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:58,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:58,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077267626] [2021-06-12 19:51:58,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:58,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:58,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:58,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:58,675 INFO L87 Difference]: Start difference. First operand 216 states and 591 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:59,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:59,007 INFO L93 Difference]: Finished difference Result 284 states and 745 transitions. [2021-06-12 19:51:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:51:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:59,008 INFO L225 Difference]: With dead ends: 284 [2021-06-12 19:51:59,008 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 19:51:59,008 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:51:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 19:51:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 216. [2021-06-12 19:51:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.744186046511628) internal successors, (590), 215 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 590 transitions. [2021-06-12 19:51:59,011 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 590 transitions. Word has length 15 [2021-06-12 19:51:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:59,011 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 590 transitions. [2021-06-12 19:51:59,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 590 transitions. [2021-06-12 19:51:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:59,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:59,011 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:59,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-06-12 19:51:59,227 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash 476922530, now seen corresponding path program 93 times [2021-06-12 19:51:59,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:59,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670480678] [2021-06-12 19:51:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:51:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:59,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:51:59,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670480678] [2021-06-12 19:51:59,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670480678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:59,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119516620] [2021-06-12 19:51:59,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:51:59,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:51:59,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:51:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:51:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:51:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:59,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:59,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:51:59,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:59,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:51:59,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:51:59,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:51:59,432 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:51:59,432 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:51:59,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:51:59,433 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:51:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:51:59,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119516620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:51:59,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:51:59,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:51:59,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793064071] [2021-06-12 19:51:59,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:51:59,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:51:59,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:51:59,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:51:59,451 INFO L87 Difference]: Start difference. First operand 216 states and 590 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:51:59,725 INFO L93 Difference]: Finished difference Result 301 states and 783 transitions. [2021-06-12 19:51:59,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:51:59,726 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:51:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:51:59,726 INFO L225 Difference]: With dead ends: 301 [2021-06-12 19:51:59,726 INFO L226 Difference]: Without dead ends: 301 [2021-06-12 19:51:59,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:51:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-12 19:51:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 219. [2021-06-12 19:51:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.7477064220183487) internal successors, (599), 218 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 599 transitions. [2021-06-12 19:51:59,729 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 599 transitions. Word has length 15 [2021-06-12 19:51:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:51:59,729 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 599 transitions. [2021-06-12 19:51:59,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:51:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 599 transitions. [2021-06-12 19:51:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:51:59,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:51:59,729 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:51:59,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-12 19:51:59,945 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:51:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:51:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -442778178, now seen corresponding path program 94 times [2021-06-12 19:51:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:51:59,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993921717] [2021-06-12 19:51:59,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:51:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:00,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993921717] [2021-06-12 19:52:00,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993921717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484178495] [2021-06-12 19:52:00,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:00,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:00,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:00,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:00,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:00,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:00,159 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:00,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:00,165 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:00,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,197 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:52:00,197 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:00,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:52:00,198 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:52:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:00,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484178495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:00,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:00,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:00,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849203899] [2021-06-12 19:52:00,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:00,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:00,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:00,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:00,223 INFO L87 Difference]: Start difference. First operand 219 states and 599 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:00,544 INFO L93 Difference]: Finished difference Result 292 states and 762 transitions. [2021-06-12 19:52:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:52:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:00,545 INFO L225 Difference]: With dead ends: 292 [2021-06-12 19:52:00,545 INFO L226 Difference]: Without dead ends: 290 [2021-06-12 19:52:00,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:52:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-12 19:52:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 221. [2021-06-12 19:52:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.7454545454545456) internal successors, (604), 220 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 604 transitions. [2021-06-12 19:52:00,547 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 604 transitions. Word has length 15 [2021-06-12 19:52:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:00,547 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 604 transitions. [2021-06-12 19:52:00,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 604 transitions. [2021-06-12 19:52:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:00,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:00,548 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:00,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:00,761 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:00,761 INFO L82 PathProgramCache]: Analyzing trace with hash 484652928, now seen corresponding path program 95 times [2021-06-12 19:52:00,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:00,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608096479] [2021-06-12 19:52:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:00,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:00,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608096479] [2021-06-12 19:52:00,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608096479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:00,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827090531] [2021-06-12 19:52:00,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:00,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:52:00,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:00,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:00,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:00,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:00,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:00,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:00,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:00,991 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:00,991 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:00,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:00,992 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:01,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827090531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:01,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:01,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:01,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165616212] [2021-06-12 19:52:01,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:01,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:01,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:01,034 INFO L87 Difference]: Start difference. First operand 221 states and 604 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:01,451 INFO L93 Difference]: Finished difference Result 359 states and 870 transitions. [2021-06-12 19:52:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:52:01,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:01,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:01,452 INFO L225 Difference]: With dead ends: 359 [2021-06-12 19:52:01,452 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 19:52:01,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 367.0ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:52:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 19:52:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 224. [2021-06-12 19:52:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.7623318385650224) internal successors, (616), 223 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 616 transitions. [2021-06-12 19:52:01,455 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 616 transitions. Word has length 15 [2021-06-12 19:52:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:01,455 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 616 transitions. [2021-06-12 19:52:01,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 616 transitions. [2021-06-12 19:52:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:01,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:01,456 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:01,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-12 19:52:01,656 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1286269156, now seen corresponding path program 96 times [2021-06-12 19:52:01,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:01,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781179787] [2021-06-12 19:52:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:01,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781179787] [2021-06-12 19:52:01,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781179787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:01,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111439075] [2021-06-12 19:52:01,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:01,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:01,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:01,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:01,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:01,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:01,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:01,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:01,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:01,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:01,901 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:01,901 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:01,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:01,902 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111439075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:01,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:01,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905970361] [2021-06-12 19:52:01,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:01,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:01,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:01,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:01,961 INFO L87 Difference]: Start difference. First operand 224 states and 616 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:02,491 INFO L93 Difference]: Finished difference Result 325 states and 819 transitions. [2021-06-12 19:52:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:52:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:02,492 INFO L225 Difference]: With dead ends: 325 [2021-06-12 19:52:02,492 INFO L226 Difference]: Without dead ends: 322 [2021-06-12 19:52:02,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:52:02,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-12 19:52:02,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 226. [2021-06-12 19:52:02,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.7644444444444445) internal successors, (622), 225 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 622 transitions. [2021-06-12 19:52:02,495 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 622 transitions. Word has length 15 [2021-06-12 19:52:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:02,495 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 622 transitions. [2021-06-12 19:52:02,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 622 transitions. [2021-06-12 19:52:02,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:02,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:02,495 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:02,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:02,709 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:02,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1290354434, now seen corresponding path program 97 times [2021-06-12 19:52:02,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:02,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443273215] [2021-06-12 19:52:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:02,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443273215] [2021-06-12 19:52:02,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443273215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651452788] [2021-06-12 19:52:02,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:02,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:02,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:02,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:02,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:02,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:02,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:02,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:02,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:02,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:02,896 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:02,929 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:02,929 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:02,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:02,930 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:02,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651452788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:02,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:02,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:02,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95105941] [2021-06-12 19:52:02,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:02,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:02,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:02,975 INFO L87 Difference]: Start difference. First operand 226 states and 622 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:03,265 INFO L93 Difference]: Finished difference Result 314 states and 803 transitions. [2021-06-12 19:52:03,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:03,266 INFO L225 Difference]: With dead ends: 314 [2021-06-12 19:52:03,266 INFO L226 Difference]: Without dead ends: 314 [2021-06-12 19:52:03,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 301.9ms TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-12 19:52:03,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 223. [2021-06-12 19:52:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.7522522522522523) internal successors, (611), 222 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 611 transitions. [2021-06-12 19:52:03,269 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 611 transitions. Word has length 15 [2021-06-12 19:52:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:03,269 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 611 transitions. [2021-06-12 19:52:03,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 611 transitions. [2021-06-12 19:52:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:03,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:03,269 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:03,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-12 19:52:03,470 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1950902984, now seen corresponding path program 98 times [2021-06-12 19:52:03,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:03,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575663872] [2021-06-12 19:52:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:03,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575663872] [2021-06-12 19:52:03,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575663872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:03,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635494361] [2021-06-12 19:52:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:03,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:03,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:03,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:03,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:03,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:03,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:03,680 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,700 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:52:03,701 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:03,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:03,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:52:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:03,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635494361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:03,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:03,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:03,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019912914] [2021-06-12 19:52:03,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:03,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:03,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:03,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:03,719 INFO L87 Difference]: Start difference. First operand 223 states and 611 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:03,838 INFO L93 Difference]: Finished difference Result 269 states and 706 transitions. [2021-06-12 19:52:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:52:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:03,839 INFO L225 Difference]: With dead ends: 269 [2021-06-12 19:52:03,839 INFO L226 Difference]: Without dead ends: 269 [2021-06-12 19:52:03,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-12 19:52:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-06-12 19:52:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2021-06-12 19:52:03,842 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 15 [2021-06-12 19:52:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:03,842 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2021-06-12 19:52:03,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2021-06-12 19:52:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:03,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:03,842 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:04,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:04,043 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:04,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:04,043 INFO L82 PathProgramCache]: Analyzing trace with hash -396853860, now seen corresponding path program 99 times [2021-06-12 19:52:04,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:04,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225268845] [2021-06-12 19:52:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:04,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225268845] [2021-06-12 19:52:04,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225268845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848074065] [2021-06-12 19:52:04,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:04,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:04,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:04,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:04,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:04,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:04,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:04,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:04,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:04,268 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:04,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:04,272 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,301 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:52:04,301 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:04,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:52:04,302 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:52:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:04,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848074065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:04,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:04,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:04,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602187473] [2021-06-12 19:52:04,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:04,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:04,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:04,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:04,328 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:04,545 INFO L93 Difference]: Finished difference Result 261 states and 683 transitions. [2021-06-12 19:52:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:52:04,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:04,546 INFO L225 Difference]: With dead ends: 261 [2021-06-12 19:52:04,546 INFO L226 Difference]: Without dead ends: 258 [2021-06-12 19:52:04,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-06-12 19:52:04,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 229. [2021-06-12 19:52:04,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.736842105263158) internal successors, (624), 228 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 624 transitions. [2021-06-12 19:52:04,549 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 624 transitions. Word has length 15 [2021-06-12 19:52:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:04,549 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 624 transitions. [2021-06-12 19:52:04,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:04,549 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 624 transitions. [2021-06-12 19:52:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:04,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:04,549 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:04,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-12 19:52:04,750 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:04,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1711260646, now seen corresponding path program 100 times [2021-06-12 19:52:04,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:04,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420651498] [2021-06-12 19:52:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:04,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:04,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420651498] [2021-06-12 19:52:04,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420651498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:04,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471717602] [2021-06-12 19:52:04,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:04,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:04,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:04,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:04,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:04,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:04,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:04,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:04,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:04,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,960 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:52:04,960 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:04,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:04,961 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:52:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:04,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471717602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:04,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:04,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228246302] [2021-06-12 19:52:04,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:04,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:04,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:04,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:04,979 INFO L87 Difference]: Start difference. First operand 229 states and 624 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:05,255 INFO L93 Difference]: Finished difference Result 268 states and 706 transitions. [2021-06-12 19:52:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:52:05,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:05,256 INFO L225 Difference]: With dead ends: 268 [2021-06-12 19:52:05,256 INFO L226 Difference]: Without dead ends: 268 [2021-06-12 19:52:05,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:52:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-12 19:52:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 228. [2021-06-12 19:52:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.753303964757709) internal successors, (625), 227 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:05,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 625 transitions. [2021-06-12 19:52:05,259 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 625 transitions. Word has length 15 [2021-06-12 19:52:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:05,259 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 625 transitions. [2021-06-12 19:52:05,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 625 transitions. [2021-06-12 19:52:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:05,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:05,259 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:05,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-06-12 19:52:05,473 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1664005942, now seen corresponding path program 101 times [2021-06-12 19:52:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:05,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600423023] [2021-06-12 19:52:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:05,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:05,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600423023] [2021-06-12 19:52:05,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600423023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:05,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044111133] [2021-06-12 19:52:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:05,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:05,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:05,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:05,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:05,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:05,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:05,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:05,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:05,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:05,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:05,721 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:52:05,721 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:05,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:52:05,722 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:52:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:05,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044111133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:05,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:05,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:05,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605438036] [2021-06-12 19:52:05,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:05,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:05,748 INFO L87 Difference]: Start difference. First operand 228 states and 625 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:05,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:05,926 INFO L93 Difference]: Finished difference Result 256 states and 681 transitions. [2021-06-12 19:52:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:05,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:05,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:05,927 INFO L225 Difference]: With dead ends: 256 [2021-06-12 19:52:05,927 INFO L226 Difference]: Without dead ends: 254 [2021-06-12 19:52:05,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:05,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-12 19:52:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 229. [2021-06-12 19:52:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-06-12 19:52:05,930 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-06-12 19:52:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:05,930 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-06-12 19:52:05,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-06-12 19:52:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:05,930 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:05,930 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:06,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:06,131 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:06,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1703530248, now seen corresponding path program 102 times [2021-06-12 19:52:06,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:06,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887742120] [2021-06-12 19:52:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:06,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887742120] [2021-06-12 19:52:06,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887742120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:06,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631659863] [2021-06-12 19:52:06,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:06,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:52:06,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:06,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:06,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:06,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:06,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:06,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:06,305 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:06,337 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:06,337 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:06,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:06,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:06,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631659863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:06,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:06,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:06,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496568788] [2021-06-12 19:52:06,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:06,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:06,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:06,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:06,383 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:06,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:06,712 INFO L93 Difference]: Finished difference Result 326 states and 793 transitions. [2021-06-12 19:52:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:52:06,713 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:06,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:06,713 INFO L225 Difference]: With dead ends: 326 [2021-06-12 19:52:06,713 INFO L226 Difference]: Without dead ends: 326 [2021-06-12 19:52:06,714 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-12 19:52:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 229. [2021-06-12 19:52:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.754385964912281) internal successors, (628), 228 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 628 transitions. [2021-06-12 19:52:06,716 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 628 transitions. Word has length 15 [2021-06-12 19:52:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:06,716 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 628 transitions. [2021-06-12 19:52:06,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 628 transitions. [2021-06-12 19:52:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:06,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:06,717 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:06,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:06,917 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash -901914020, now seen corresponding path program 103 times [2021-06-12 19:52:06,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:06,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314003503] [2021-06-12 19:52:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:06,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:07,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:07,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314003503] [2021-06-12 19:52:07,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314003503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:07,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443754127] [2021-06-12 19:52:07,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:07,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:07,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:07,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:07,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:07,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:07,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,161 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:07,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:07,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:07,162 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:07,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443754127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:07,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:07,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:07,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433807010] [2021-06-12 19:52:07,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:07,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:07,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:07,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:07,220 INFO L87 Difference]: Start difference. First operand 229 states and 628 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:07,520 INFO L93 Difference]: Finished difference Result 288 states and 732 transitions. [2021-06-12 19:52:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:52:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:07,520 INFO L225 Difference]: With dead ends: 288 [2021-06-12 19:52:07,521 INFO L226 Difference]: Without dead ends: 285 [2021-06-12 19:52:07,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-12 19:52:07,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 233. [2021-06-12 19:52:07,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.7629310344827585) internal successors, (641), 232 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 641 transitions. [2021-06-12 19:52:07,523 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 641 transitions. Word has length 15 [2021-06-12 19:52:07,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:07,523 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 641 transitions. [2021-06-12 19:52:07,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:07,523 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 641 transitions. [2021-06-12 19:52:07,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:07,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:07,524 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:07,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable649,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:07,724 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:07,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:07,724 INFO L82 PathProgramCache]: Analyzing trace with hash 816429686, now seen corresponding path program 104 times [2021-06-12 19:52:07,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:07,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192158233] [2021-06-12 19:52:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:07,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192158233] [2021-06-12 19:52:07,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192158233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:07,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504159242] [2021-06-12 19:52:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:07,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:07,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:07,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:07,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:07,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:07,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:07,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:07,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:07,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:07,940 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:07,940 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:07,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:07,941 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:07,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504159242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:07,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:07,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:07,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812105756] [2021-06-12 19:52:07,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:07,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:07,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:07,996 INFO L87 Difference]: Start difference. First operand 233 states and 641 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:08,199 INFO L93 Difference]: Finished difference Result 286 states and 730 transitions. [2021-06-12 19:52:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:52:08,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:08,200 INFO L225 Difference]: With dead ends: 286 [2021-06-12 19:52:08,200 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:52:08,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:52:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 229. [2021-06-12 19:52:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-06-12 19:52:08,202 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-06-12 19:52:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:08,202 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-06-12 19:52:08,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-06-12 19:52:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:08,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:08,203 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:08,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:08,415 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:08,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash -638175266, now seen corresponding path program 105 times [2021-06-12 19:52:08,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:08,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581056923] [2021-06-12 19:52:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:08,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:08,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:08,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581056923] [2021-06-12 19:52:08,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581056923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:08,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444347704] [2021-06-12 19:52:08,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:08,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:08,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:08,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:08,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:08,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:08,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:08,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:08,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:08,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:08,616 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:52:08,616 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:08,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:08,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:52:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:08,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444347704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:08,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:08,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26763572] [2021-06-12 19:52:08,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:08,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:08,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:08,633 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:08,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:08,814 INFO L93 Difference]: Finished difference Result 290 states and 741 transitions. [2021-06-12 19:52:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:08,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:08,815 INFO L225 Difference]: With dead ends: 290 [2021-06-12 19:52:08,815 INFO L226 Difference]: Without dead ends: 290 [2021-06-12 19:52:08,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-12 19:52:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 229. [2021-06-12 19:52:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.75) internal successors, (627), 228 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 627 transitions. [2021-06-12 19:52:08,818 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 627 transitions. Word has length 15 [2021-06-12 19:52:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:08,818 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 627 transitions. [2021-06-12 19:52:08,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 627 transitions. [2021-06-12 19:52:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:08,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:08,818 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:09,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable659 [2021-06-12 19:52:09,034 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:09,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:09,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1557875974, now seen corresponding path program 106 times [2021-06-12 19:52:09,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:09,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965709412] [2021-06-12 19:52:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:09,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965709412] [2021-06-12 19:52:09,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965709412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:09,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538616057] [2021-06-12 19:52:09,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:09,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:09,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:09,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:09,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:09,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:09,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:09,218 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:09,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:09,224 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:09,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:09,255 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:52:09,255 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:09,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:52:09,256 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:52:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:09,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538616057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:09,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:09,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:09,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176090363] [2021-06-12 19:52:09,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:09,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:09,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:09,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:09,284 INFO L87 Difference]: Start difference. First operand 229 states and 627 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:09,661 INFO L93 Difference]: Finished difference Result 265 states and 692 transitions. [2021-06-12 19:52:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:52:09,661 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:09,662 INFO L225 Difference]: With dead ends: 265 [2021-06-12 19:52:09,662 INFO L226 Difference]: Without dead ends: 261 [2021-06-12 19:52:09,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:52:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-12 19:52:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 227. [2021-06-12 19:52:09,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.747787610619469) internal successors, (621), 226 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 621 transitions. [2021-06-12 19:52:09,664 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 621 transitions. Word has length 15 [2021-06-12 19:52:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:09,665 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 621 transitions. [2021-06-12 19:52:09,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 621 transitions. [2021-06-12 19:52:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:09,665 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:09,665 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:09,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-12 19:52:09,881 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash 977076318, now seen corresponding path program 107 times [2021-06-12 19:52:09,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:09,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553524973] [2021-06-12 19:52:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:09,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:09,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553524973] [2021-06-12 19:52:09,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553524973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:09,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32420493] [2021-06-12 19:52:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:09,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:52:09,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:09,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:09,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:10,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:10,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:10,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:10,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:10,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,064 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:10,065 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:10,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:10,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:10,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32420493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:10,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:10,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:10,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190689196] [2021-06-12 19:52:10,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:10,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:10,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:10,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:10,128 INFO L87 Difference]: Start difference. First operand 227 states and 621 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:10,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:10,586 INFO L93 Difference]: Finished difference Result 283 states and 713 transitions. [2021-06-12 19:52:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:52:10,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:10,587 INFO L225 Difference]: With dead ends: 283 [2021-06-12 19:52:10,587 INFO L226 Difference]: Without dead ends: 279 [2021-06-12 19:52:10,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-12 19:52:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 227. [2021-06-12 19:52:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.7389380530973453) internal successors, (619), 226 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 619 transitions. [2021-06-12 19:52:10,590 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 619 transitions. Word has length 15 [2021-06-12 19:52:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:10,590 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 619 transitions. [2021-06-12 19:52:10,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:10,590 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 619 transitions. [2021-06-12 19:52:10,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:10,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:10,590 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:10,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable669 [2021-06-12 19:52:10,791 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2119849864, now seen corresponding path program 108 times [2021-06-12 19:52:10,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:10,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132782131] [2021-06-12 19:52:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:10,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:10,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132782131] [2021-06-12 19:52:10,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132782131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:10,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651439646] [2021-06-12 19:52:10,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:10,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:10,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:10,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:10,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:10,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:10,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:10,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:10,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:10,981 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:11,012 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:11,012 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:11,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:11,013 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:11,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651439646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:11,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:11,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:11,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592175853] [2021-06-12 19:52:11,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:11,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:11,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:11,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:11,057 INFO L87 Difference]: Start difference. First operand 227 states and 619 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:11,451 INFO L93 Difference]: Finished difference Result 350 states and 828 transitions. [2021-06-12 19:52:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:52:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:11,452 INFO L225 Difference]: With dead ends: 350 [2021-06-12 19:52:11,452 INFO L226 Difference]: Without dead ends: 350 [2021-06-12 19:52:11,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:52:11,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-12 19:52:11,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 231. [2021-06-12 19:52:11,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.756521739130435) internal successors, (634), 230 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 634 transitions. [2021-06-12 19:52:11,455 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 634 transitions. Word has length 15 [2021-06-12 19:52:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:11,455 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 634 transitions. [2021-06-12 19:52:11,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 634 transitions. [2021-06-12 19:52:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:11,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:11,456 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:11,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable674 [2021-06-12 19:52:11,665 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:11,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:11,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1318233636, now seen corresponding path program 109 times [2021-06-12 19:52:11,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:11,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49998502] [2021-06-12 19:52:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:11,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49998502] [2021-06-12 19:52:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49998502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127817270] [2021-06-12 19:52:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:11,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:11,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:11,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:11,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:11,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:11,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:11,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:11,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:11,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:11,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:11,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:11,863 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:11,863 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:11,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:11,864 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:11,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127817270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:11,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:11,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:11,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606976315] [2021-06-12 19:52:11,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:11,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:11,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:11,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:11,920 INFO L87 Difference]: Start difference. First operand 231 states and 634 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:12,467 INFO L93 Difference]: Finished difference Result 340 states and 815 transitions. [2021-06-12 19:52:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:52:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:12,468 INFO L225 Difference]: With dead ends: 340 [2021-06-12 19:52:12,468 INFO L226 Difference]: Without dead ends: 332 [2021-06-12 19:52:12,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:52:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-12 19:52:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 236. [2021-06-12 19:52:12,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.753191489361702) internal successors, (647), 235 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 647 transitions. [2021-06-12 19:52:12,471 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 647 transitions. Word has length 15 [2021-06-12 19:52:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:12,471 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 647 transitions. [2021-06-12 19:52:12,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:12,471 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 647 transitions. [2021-06-12 19:52:12,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:12,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:12,471 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:12,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable678 [2021-06-12 19:52:12,672 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:12,672 INFO L82 PathProgramCache]: Analyzing trace with hash 400110070, now seen corresponding path program 110 times [2021-06-12 19:52:12,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:12,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446146775] [2021-06-12 19:52:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:12,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:12,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:12,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446146775] [2021-06-12 19:52:12,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446146775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122488823] [2021-06-12 19:52:12,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:12,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:12,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:12,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:12,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:12,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:12,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:12,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:12,837 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:12,869 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:12,869 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:12,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:12,870 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:12,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:12,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122488823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:12,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:12,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:12,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098450156] [2021-06-12 19:52:12,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:12,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:12,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:12,915 INFO L87 Difference]: Start difference. First operand 236 states and 647 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:13,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:13,268 INFO L93 Difference]: Finished difference Result 335 states and 813 transitions. [2021-06-12 19:52:13,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:52:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:13,269 INFO L225 Difference]: With dead ends: 335 [2021-06-12 19:52:13,269 INFO L226 Difference]: Without dead ends: 335 [2021-06-12 19:52:13,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:52:13,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-12 19:52:13,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2021-06-12 19:52:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7381974248927037) internal successors, (638), 233 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 638 transitions. [2021-06-12 19:52:13,272 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 638 transitions. Word has length 15 [2021-06-12 19:52:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:13,272 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 638 transitions. [2021-06-12 19:52:13,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:13,272 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 638 transitions. [2021-06-12 19:52:13,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:13,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:13,273 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:13,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable684,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:13,473 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1310503238, now seen corresponding path program 111 times [2021-06-12 19:52:13,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:13,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836676189] [2021-06-12 19:52:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:13,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:13,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836676189] [2021-06-12 19:52:13,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836676189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:13,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527987602] [2021-06-12 19:52:13,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:13,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:13,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:13,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:13,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:13,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:13,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,685 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:52:13,685 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:13,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:13,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:52:13,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:13,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527987602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:13,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:13,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 19:52:13,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490623563] [2021-06-12 19:52:13,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:13,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:13,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:13,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:13,706 INFO L87 Difference]: Start difference. First operand 234 states and 638 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:13,893 INFO L93 Difference]: Finished difference Result 339 states and 822 transitions. [2021-06-12 19:52:13,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:52:13,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:13,894 INFO L225 Difference]: With dead ends: 339 [2021-06-12 19:52:13,894 INFO L226 Difference]: Without dead ends: 339 [2021-06-12 19:52:13,895 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-12 19:52:13,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 234. [2021-06-12 19:52:13,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7381974248927037) internal successors, (638), 233 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 638 transitions. [2021-06-12 19:52:13,897 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 638 transitions. Word has length 15 [2021-06-12 19:52:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:13,897 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 638 transitions. [2021-06-12 19:52:13,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 638 transitions. [2021-06-12 19:52:13,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:13,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:13,898 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:14,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable688 [2021-06-12 19:52:14,098 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1065104704, now seen corresponding path program 112 times [2021-06-12 19:52:14,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:14,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840024919] [2021-06-12 19:52:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:14,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:14,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840024919] [2021-06-12 19:52:14,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840024919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:14,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693763304] [2021-06-12 19:52:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:14,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:14,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:14,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:14,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:14,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:14,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:14,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:14,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,310 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:52:14,310 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:14,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,311 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:52:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:14,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693763304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:14,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:14,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:14,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050839158] [2021-06-12 19:52:14,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:14,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:14,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:14,330 INFO L87 Difference]: Start difference. First operand 234 states and 638 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:14,499 INFO L93 Difference]: Finished difference Result 326 states and 807 transitions. [2021-06-12 19:52:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:14,500 INFO L225 Difference]: With dead ends: 326 [2021-06-12 19:52:14,500 INFO L226 Difference]: Without dead ends: 326 [2021-06-12 19:52:14,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-12 19:52:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 252. [2021-06-12 19:52:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.752988047808765) internal successors, (691), 251 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 691 transitions. [2021-06-12 19:52:14,503 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 691 transitions. Word has length 15 [2021-06-12 19:52:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:14,503 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 691 transitions. [2021-06-12 19:52:14,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 691 transitions. [2021-06-12 19:52:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:14,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:14,504 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:14,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:14,720 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:14,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:14,720 INFO L82 PathProgramCache]: Analyzing trace with hash 488944420, now seen corresponding path program 113 times [2021-06-12 19:52:14,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:14,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261190883] [2021-06-12 19:52:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:14,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:14,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261190883] [2021-06-12 19:52:14,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261190883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:14,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866465599] [2021-06-12 19:52:14,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:14,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:52:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:14,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:14,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:14,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:14,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:14,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:14,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:14,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:14,960 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:14,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:14,963 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:14,992 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:52:14,992 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:14,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:52:14,993 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:52:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:15,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866465599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:15,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:15,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:15,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544940763] [2021-06-12 19:52:15,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:15,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:15,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:15,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:15,018 INFO L87 Difference]: Start difference. First operand 252 states and 691 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:15,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:15,399 INFO L93 Difference]: Finished difference Result 306 states and 765 transitions. [2021-06-12 19:52:15,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:52:15,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:15,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:15,400 INFO L225 Difference]: With dead ends: 306 [2021-06-12 19:52:15,400 INFO L226 Difference]: Without dead ends: 303 [2021-06-12 19:52:15,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:52:15,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-12 19:52:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 255. [2021-06-12 19:52:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.736220472440945) internal successors, (695), 254 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:15,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 695 transitions. [2021-06-12 19:52:15,403 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 695 transitions. Word has length 15 [2021-06-12 19:52:15,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:15,403 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 695 transitions. [2021-06-12 19:52:15,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 695 transitions. [2021-06-12 19:52:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:15,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:15,403 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:15,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:15,605 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash -825462366, now seen corresponding path program 114 times [2021-06-12 19:52:15,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:15,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087624285] [2021-06-12 19:52:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:15,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:15,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087624285] [2021-06-12 19:52:15,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087624285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:15,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988056436] [2021-06-12 19:52:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:15,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:15,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:15,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:15,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:15,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:15,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:15,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:15,866 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:52:15,867 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:15,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:15,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:52:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:15,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988056436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:15,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:15,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:15,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174899740] [2021-06-12 19:52:15,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:15,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:15,887 INFO L87 Difference]: Start difference. First operand 255 states and 695 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:16,275 INFO L93 Difference]: Finished difference Result 335 states and 825 transitions. [2021-06-12 19:52:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:52:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:16,276 INFO L225 Difference]: With dead ends: 335 [2021-06-12 19:52:16,276 INFO L226 Difference]: Without dead ends: 335 [2021-06-12 19:52:16,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:52:16,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-12 19:52:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 251. [2021-06-12 19:52:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.756) internal successors, (689), 250 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 689 transitions. [2021-06-12 19:52:16,280 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 689 transitions. Word has length 15 [2021-06-12 19:52:16,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:16,280 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 689 transitions. [2021-06-12 19:52:16,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 689 transitions. [2021-06-12 19:52:16,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:16,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:16,281 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:16,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-12 19:52:16,497 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:16,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1745163074, now seen corresponding path program 115 times [2021-06-12 19:52:16,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:16,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913793533] [2021-06-12 19:52:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:16,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:16,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913793533] [2021-06-12 19:52:16,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913793533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:16,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50559860] [2021-06-12 19:52:16,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 19:52:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:16,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:16,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:16,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:16,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:16,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:16,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:16,732 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:16,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:16,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:16,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:16,765 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:52:16,765 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:16,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:52:16,766 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:52:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:16,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50559860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:16,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:16,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:16,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096616936] [2021-06-12 19:52:16,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:16,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:16,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:16,792 INFO L87 Difference]: Start difference. First operand 251 states and 689 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:17,238 INFO L93 Difference]: Finished difference Result 297 states and 755 transitions. [2021-06-12 19:52:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:52:17,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:17,239 INFO L225 Difference]: With dead ends: 297 [2021-06-12 19:52:17,239 INFO L226 Difference]: Without dead ends: 295 [2021-06-12 19:52:17,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-12 19:52:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 252. [2021-06-12 19:52:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.752988047808765) internal successors, (691), 251 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 691 transitions. [2021-06-12 19:52:17,242 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 691 transitions. Word has length 15 [2021-06-12 19:52:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:17,242 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 691 transitions. [2021-06-12 19:52:17,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 691 transitions. [2021-06-12 19:52:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:17,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:17,243 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:17,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:17,451 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash -817731968, now seen corresponding path program 116 times [2021-06-12 19:52:17,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:17,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350180421] [2021-06-12 19:52:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:17,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350180421] [2021-06-12 19:52:17,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350180421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008661298] [2021-06-12 19:52:17,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:17,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:17,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:17,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:17,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:17,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:17,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:17,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:17,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:17,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:17,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:17,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:17,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:17,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:17,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:17,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:17,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:17,655 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:17,655 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:17,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:17,656 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:17,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:17,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008661298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:17,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:17,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:17,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121968325] [2021-06-12 19:52:17,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:17,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:17,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:17,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:17,700 INFO L87 Difference]: Start difference. First operand 252 states and 691 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:18,097 INFO L93 Difference]: Finished difference Result 342 states and 814 transitions. [2021-06-12 19:52:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:52:18,097 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:18,098 INFO L225 Difference]: With dead ends: 342 [2021-06-12 19:52:18,098 INFO L226 Difference]: Without dead ends: 341 [2021-06-12 19:52:18,098 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:52:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-12 19:52:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 243. [2021-06-12 19:52:18,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.727272727272727) internal successors, (660), 242 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 660 transitions. [2021-06-12 19:52:18,101 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 660 transitions. Word has length 15 [2021-06-12 19:52:18,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:18,101 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 660 transitions. [2021-06-12 19:52:18,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:18,101 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 660 transitions. [2021-06-12 19:52:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:18,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:18,102 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:18,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:18,318 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash -16115740, now seen corresponding path program 117 times [2021-06-12 19:52:18,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:18,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707845070] [2021-06-12 19:52:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:18,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:18,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707845070] [2021-06-12 19:52:18,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707845070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:18,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667006703] [2021-06-12 19:52:18,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:18,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:18,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:18,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:18,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:18,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:18,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:18,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:18,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:18,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:18,513 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:18,548 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:18,548 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:18,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:18,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:18,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667006703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:18,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:18,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:18,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309329795] [2021-06-12 19:52:18,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:18,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:18,615 INFO L87 Difference]: Start difference. First operand 243 states and 660 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:19,104 INFO L93 Difference]: Finished difference Result 308 states and 761 transitions. [2021-06-12 19:52:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:52:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:19,105 INFO L225 Difference]: With dead ends: 308 [2021-06-12 19:52:19,105 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:52:19,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:19,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:52:19,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 247. [2021-06-12 19:52:19,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.7357723577235773) internal successors, (673), 246 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 673 transitions. [2021-06-12 19:52:19,108 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 673 transitions. Word has length 15 [2021-06-12 19:52:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:19,108 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 673 transitions. [2021-06-12 19:52:19,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 673 transitions. [2021-06-12 19:52:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:19,108 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:19,108 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:19,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable714 [2021-06-12 19:52:19,309 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:19,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:19,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1702227966, now seen corresponding path program 118 times [2021-06-12 19:52:19,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:19,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824849453] [2021-06-12 19:52:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:19,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:19,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824849453] [2021-06-12 19:52:19,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824849453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:19,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79054072] [2021-06-12 19:52:19,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:19,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:19,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:19,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:19,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:19,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:19,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:19,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:19,482 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:19,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:19,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:19,517 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:19,517 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:19,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:19,518 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:19,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79054072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:19,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:19,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:19,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693910130] [2021-06-12 19:52:19,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:19,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:19,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:19,570 INFO L87 Difference]: Start difference. First operand 247 states and 673 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:19,802 INFO L93 Difference]: Finished difference Result 299 states and 749 transitions. [2021-06-12 19:52:19,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:19,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:19,803 INFO L225 Difference]: With dead ends: 299 [2021-06-12 19:52:19,803 INFO L226 Difference]: Without dead ends: 299 [2021-06-12 19:52:19,803 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-12 19:52:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 236. [2021-06-12 19:52:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.7148936170212767) internal successors, (638), 235 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 638 transitions. [2021-06-12 19:52:19,806 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 638 transitions. Word has length 15 [2021-06-12 19:52:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:19,806 INFO L482 AbstractCegarLoop]: Abstraction has 236 states and 638 transitions. [2021-06-12 19:52:19,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 638 transitions. [2021-06-12 19:52:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:19,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:19,806 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:20,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable720,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:20,007 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:20,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:20,007 INFO L82 PathProgramCache]: Analyzing trace with hash -846468574, now seen corresponding path program 119 times [2021-06-12 19:52:20,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:20,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331925906] [2021-06-12 19:52:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:20,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:20,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331925906] [2021-06-12 19:52:20,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331925906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:20,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438473402] [2021-06-12 19:52:20,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:20,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:52:20,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:20,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:20,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:20,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:20,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:20,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:20,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:20,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,202 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:52:20,202 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:20,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,203 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:52:20,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:20,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438473402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:20,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:20,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:52:20,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95508478] [2021-06-12 19:52:20,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:20,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:20,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:20,221 INFO L87 Difference]: Start difference. First operand 236 states and 638 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:20,390 INFO L93 Difference]: Finished difference Result 299 states and 753 transitions. [2021-06-12 19:52:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:52:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:20,391 INFO L225 Difference]: With dead ends: 299 [2021-06-12 19:52:20,391 INFO L226 Difference]: Without dead ends: 299 [2021-06-12 19:52:20,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-12 19:52:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 241. [2021-06-12 19:52:20,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7291666666666665) internal successors, (655), 240 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 655 transitions. [2021-06-12 19:52:20,394 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 655 transitions. Word has length 15 [2021-06-12 19:52:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:20,394 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 655 transitions. [2021-06-12 19:52:20,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 655 transitions. [2021-06-12 19:52:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:20,394 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:20,394 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:20,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:20,595 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:20,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1766169282, now seen corresponding path program 120 times [2021-06-12 19:52:20,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:20,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932189461] [2021-06-12 19:52:20,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:20,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:20,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:20,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932189461] [2021-06-12 19:52:20,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932189461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:20,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027829462] [2021-06-12 19:52:20,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:20,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:20,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:20,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:20,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:20,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:20,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:20,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:20,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:20,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:20,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:52:20,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:52:20,797 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:20,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:20,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:20,828 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:52:20,829 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:20,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:52:20,830 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:52:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:20,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027829462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:20,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:20,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:52:20,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132477035] [2021-06-12 19:52:20,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:20,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:20,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:20,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:20,855 INFO L87 Difference]: Start difference. First operand 241 states and 655 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:21,126 INFO L93 Difference]: Finished difference Result 275 states and 703 transitions. [2021-06-12 19:52:21,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:52:21,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:21,127 INFO L225 Difference]: With dead ends: 275 [2021-06-12 19:52:21,127 INFO L226 Difference]: Without dead ends: 271 [2021-06-12 19:52:21,127 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 266.2ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-12 19:52:21,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 241. [2021-06-12 19:52:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.720833333333333) internal successors, (653), 240 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 653 transitions. [2021-06-12 19:52:21,130 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 653 transitions. Word has length 15 [2021-06-12 19:52:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:21,130 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 653 transitions. [2021-06-12 19:52:21,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 653 transitions. [2021-06-12 19:52:21,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:21,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:21,130 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:21,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:21,331 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:21,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:21,331 INFO L82 PathProgramCache]: Analyzing trace with hash -838738176, now seen corresponding path program 121 times [2021-06-12 19:52:21,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:21,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987428109] [2021-06-12 19:52:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:21,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987428109] [2021-06-12 19:52:21,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987428109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:21,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356881548] [2021-06-12 19:52:21,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:21,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:21,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:21,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:21,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:21,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:21,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:21,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:21,527 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:21,527 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:21,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:21,528 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:21,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356881548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:21,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:21,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:52:21,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716889378] [2021-06-12 19:52:21,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:21,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:21,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:21,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:21,572 INFO L87 Difference]: Start difference. First operand 241 states and 653 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:21,786 INFO L93 Difference]: Finished difference Result 314 states and 767 transitions. [2021-06-12 19:52:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:52:21,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:21,787 INFO L225 Difference]: With dead ends: 314 [2021-06-12 19:52:21,787 INFO L226 Difference]: Without dead ends: 314 [2021-06-12 19:52:21,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-12 19:52:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 243. [2021-06-12 19:52:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.727272727272727) internal successors, (660), 242 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 660 transitions. [2021-06-12 19:52:21,789 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 660 transitions. Word has length 15 [2021-06-12 19:52:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:21,790 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 660 transitions. [2021-06-12 19:52:21,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 660 transitions. [2021-06-12 19:52:21,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:21,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:21,790 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:21,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-12 19:52:21,991 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:21,991 INFO L82 PathProgramCache]: Analyzing trace with hash -37121948, now seen corresponding path program 122 times [2021-06-12 19:52:21,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:21,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433025511] [2021-06-12 19:52:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433025511] [2021-06-12 19:52:22,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433025511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:22,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597821526] [2021-06-12 19:52:22,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:22,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:22,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:22,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:22,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:22,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:22,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:22,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:22,189 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:22,189 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:22,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:22,190 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597821526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:22,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:22,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:52:22,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964793156] [2021-06-12 19:52:22,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:22,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:22,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:22,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:22,247 INFO L87 Difference]: Start difference. First operand 243 states and 660 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:22,594 INFO L93 Difference]: Finished difference Result 292 states and 739 transitions. [2021-06-12 19:52:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:52:22,594 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:22,595 INFO L225 Difference]: With dead ends: 292 [2021-06-12 19:52:22,595 INFO L226 Difference]: Without dead ends: 289 [2021-06-12 19:52:22,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:52:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-12 19:52:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 246. [2021-06-12 19:52:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.7346938775510203) internal successors, (670), 245 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 670 transitions. [2021-06-12 19:52:22,598 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 670 transitions. Word has length 15 [2021-06-12 19:52:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:22,598 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 670 transitions. [2021-06-12 19:52:22,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:22,598 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 670 transitions. [2021-06-12 19:52:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:22,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:22,598 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:22,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:22,799 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:22,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:22,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1681221758, now seen corresponding path program 123 times [2021-06-12 19:52:22,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:22,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173076241] [2021-06-12 19:52:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:22,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:22,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173076241] [2021-06-12 19:52:22,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173076241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:22,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409411468] [2021-06-12 19:52:22,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:22,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:52:22,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:22,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:22,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:22,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:22,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:23,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:23,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:23,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,038 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:23,038 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:23,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:23,038 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:23,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409411468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:23,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:23,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 19:52:23,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349580039] [2021-06-12 19:52:23,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:52:23,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:23,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:52:23,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:52:23,080 INFO L87 Difference]: Start difference. First operand 246 states and 670 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:23,299 INFO L93 Difference]: Finished difference Result 286 states and 730 transitions. [2021-06-12 19:52:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:23,299 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:23,299 INFO L225 Difference]: With dead ends: 286 [2021-06-12 19:52:23,300 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:52:23,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:52:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 241. [2021-06-12 19:52:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.7083333333333335) internal successors, (650), 240 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:23,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 650 transitions. [2021-06-12 19:52:23,302 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 650 transitions. Word has length 15 [2021-06-12 19:52:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:23,302 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 650 transitions. [2021-06-12 19:52:23,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 650 transitions. [2021-06-12 19:52:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:23,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:23,303 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:23,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable744 [2021-06-12 19:52:23,519 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:23,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:23,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1255057792, now seen corresponding path program 124 times [2021-06-12 19:52:23,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:23,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988316862] [2021-06-12 19:52:23,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:23,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:23,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988316862] [2021-06-12 19:52:23,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988316862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:23,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099048768] [2021-06-12 19:52:23,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:23,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:23,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:23,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:23,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:23,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:23,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:23,703 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:23,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:23,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:23,749 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:23,750 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:23,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:23,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:23,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099048768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:23,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:23,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:23,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714127181] [2021-06-12 19:52:23,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:23,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:23,795 INFO L87 Difference]: Start difference. First operand 241 states and 650 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:23,997 INFO L93 Difference]: Finished difference Result 321 states and 788 transitions. [2021-06-12 19:52:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:52:23,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:23,998 INFO L225 Difference]: With dead ends: 321 [2021-06-12 19:52:23,998 INFO L226 Difference]: Without dead ends: 321 [2021-06-12 19:52:23,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-12 19:52:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 245. [2021-06-12 19:52:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.7254098360655736) internal successors, (665), 244 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 665 transitions. [2021-06-12 19:52:24,001 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 665 transitions. Word has length 15 [2021-06-12 19:52:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:24,001 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 665 transitions. [2021-06-12 19:52:24,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 665 transitions. [2021-06-12 19:52:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:24,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:24,002 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:24,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable748 [2021-06-12 19:52:24,202 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash -453441564, now seen corresponding path program 125 times [2021-06-12 19:52:24,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:24,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049647584] [2021-06-12 19:52:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:24,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:24,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049647584] [2021-06-12 19:52:24,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049647584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:24,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525279354] [2021-06-12 19:52:24,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:24,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:52:24,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:24,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:24,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:24,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:24,387 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:24,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:24,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:24,422 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:24,422 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:24,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:24,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:24,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525279354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:24,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:24,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:24,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513190726] [2021-06-12 19:52:24,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:24,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:24,479 INFO L87 Difference]: Start difference. First operand 245 states and 665 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:24,979 INFO L93 Difference]: Finished difference Result 330 states and 799 transitions. [2021-06-12 19:52:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:52:24,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:24,980 INFO L225 Difference]: With dead ends: 330 [2021-06-12 19:52:24,980 INFO L226 Difference]: Without dead ends: 322 [2021-06-12 19:52:24,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:52:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-12 19:52:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 251. [2021-06-12 19:52:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.728) internal successors, (682), 250 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 682 transitions. [2021-06-12 19:52:24,983 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 682 transitions. Word has length 15 [2021-06-12 19:52:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:24,983 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 682 transitions. [2021-06-12 19:52:24,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:24,983 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 682 transitions. [2021-06-12 19:52:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:24,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:24,984 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:25,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-12 19:52:25,200 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:25,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1264902142, now seen corresponding path program 126 times [2021-06-12 19:52:25,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:25,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308673528] [2021-06-12 19:52:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:25,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:25,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308673528] [2021-06-12 19:52:25,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308673528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:25,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564724918] [2021-06-12 19:52:25,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:25,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:52:25,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:25,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:25,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:25,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:25,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:25,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:25,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:25,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:52:25,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:25,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:25,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:25,401 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:25,440 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:52:25,440 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:25,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:25,441 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:52:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:25,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564724918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:25,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:25,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:25,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516472431] [2021-06-12 19:52:25,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:25,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:25,486 INFO L87 Difference]: Start difference. First operand 251 states and 682 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:25,830 INFO L93 Difference]: Finished difference Result 330 states and 831 transitions. [2021-06-12 19:52:25,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:52:25,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:25,831 INFO L225 Difference]: With dead ends: 330 [2021-06-12 19:52:25,831 INFO L226 Difference]: Without dead ends: 330 [2021-06-12 19:52:25,831 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:52:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-12 19:52:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 265. [2021-06-12 19:52:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.746212121212121) internal successors, (725), 264 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 725 transitions. [2021-06-12 19:52:25,834 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 725 transitions. Word has length 15 [2021-06-12 19:52:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:25,834 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 725 transitions. [2021-06-12 19:52:25,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 725 transitions. [2021-06-12 19:52:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:25,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:25,834 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:26,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:26,035 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash -445711166, now seen corresponding path program 127 times [2021-06-12 19:52:26,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:26,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95937812] [2021-06-12 19:52:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:26,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95937812] [2021-06-12 19:52:26,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95937812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:26,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018231721] [2021-06-12 19:52:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:26,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:26,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:26,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:26,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:26,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:26,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:26,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,236 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:52:26,236 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:26,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:26,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:52:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:26,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018231721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:26,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:26,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:26,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328940833] [2021-06-12 19:52:26,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:26,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:26,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:26,264 INFO L87 Difference]: Start difference. First operand 265 states and 725 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:26,675 INFO L93 Difference]: Finished difference Result 361 states and 878 transitions. [2021-06-12 19:52:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:52:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:26,676 INFO L225 Difference]: With dead ends: 361 [2021-06-12 19:52:26,676 INFO L226 Difference]: Without dead ends: 361 [2021-06-12 19:52:26,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:52:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-12 19:52:26,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 256. [2021-06-12 19:52:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.7294117647058824) internal successors, (696), 255 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 696 transitions. [2021-06-12 19:52:26,679 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 696 transitions. Word has length 15 [2021-06-12 19:52:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:26,679 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 696 transitions. [2021-06-12 19:52:26,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 696 transitions. [2021-06-12 19:52:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-12 19:52:26,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:26,679 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:26,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable762 [2021-06-12 19:52:26,880 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1935116162, now seen corresponding path program 128 times [2021-06-12 19:52:26,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:26,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736788354] [2021-06-12 19:52:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:26,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:26,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736788354] [2021-06-12 19:52:26,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736788354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:26,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811482127] [2021-06-12 19:52:26,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:26,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:26,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:26,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:52:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:27,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:27,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:27,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:52:27,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:27,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:27,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:52:27,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:27,089 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:52:27,090 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:27,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:27,090 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:52:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:27,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811482127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:27,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:27,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 19:52:27,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769597922] [2021-06-12 19:52:27,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:27,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:27,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:27,112 INFO L87 Difference]: Start difference. First operand 256 states and 696 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:27,260 INFO L93 Difference]: Finished difference Result 323 states and 803 transitions. [2021-06-12 19:52:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-12 19:52:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:27,261 INFO L225 Difference]: With dead ends: 323 [2021-06-12 19:52:27,261 INFO L226 Difference]: Without dead ends: 323 [2021-06-12 19:52:27,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-12 19:52:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 235. [2021-06-12 19:52:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6794871794871793) internal successors, (627), 234 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 627 transitions. [2021-06-12 19:52:27,266 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 627 transitions. Word has length 15 [2021-06-12 19:52:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:27,267 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 627 transitions. [2021-06-12 19:52:27,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 627 transitions. [2021-06-12 19:52:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:27,267 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:27,267 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:27,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-06-12 19:52:27,468 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:27,468 INFO L82 PathProgramCache]: Analyzing trace with hash 757370424, now seen corresponding path program 129 times [2021-06-12 19:52:27,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:27,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823733092] [2021-06-12 19:52:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:27,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:27,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823733092] [2021-06-12 19:52:27,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823733092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:27,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572888155] [2021-06-12 19:52:27,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:28,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:28,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:28,015 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:28,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-12 19:52:28,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:28,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:28,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:28,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,563 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-06-12 19:52:28,563 INFO L518 ElimStorePlain]: Eliminatee v_prenex_65 vanished before elimination [2021-06-12 19:52:28,563 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:28,563 INFO L518 ElimStorePlain]: Eliminatee v_prenex_64 vanished before elimination [2021-06-12 19:52:28,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:28,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:52:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:28,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572888155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:28,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:28,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:52:28,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925508417] [2021-06-12 19:52:28,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:52:28,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:52:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:28,592 INFO L87 Difference]: Start difference. First operand 235 states and 627 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:29,199 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2021-06-12 19:52:29,432 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 83 [2021-06-12 19:52:29,575 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2021-06-12 19:52:29,815 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 87 [2021-06-12 19:52:30,135 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2021-06-12 19:52:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:30,472 INFO L93 Difference]: Finished difference Result 362 states and 942 transitions. [2021-06-12 19:52:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:52:30,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:30,473 INFO L225 Difference]: With dead ends: 362 [2021-06-12 19:52:30,473 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 19:52:30,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2285.1ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:52:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 19:52:30,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 246. [2021-06-12 19:52:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6653061224489796) internal successors, (653), 245 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 653 transitions. [2021-06-12 19:52:30,476 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 653 transitions. Word has length 16 [2021-06-12 19:52:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:30,476 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 653 transitions. [2021-06-12 19:52:30,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 653 transitions. [2021-06-12 19:52:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:30,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:30,477 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:30,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-06-12 19:52:30,677 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:30,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1098862454, now seen corresponding path program 130 times [2021-06-12 19:52:30,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:30,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502269887] [2021-06-12 19:52:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:30,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:30,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502269887] [2021-06-12 19:52:30,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502269887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:30,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971784121] [2021-06-12 19:52:30,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:30,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:30,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:30,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:30,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:31,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:52:31,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 19:52:31,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:31,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:52:31,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,340 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-12 19:52:31,341 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:31,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:31,341 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-12 19:52:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:31,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971784121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:31,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:31,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:52:31,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730200569] [2021-06-12 19:52:31,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:52:31,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:31,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:52:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:31,366 INFO L87 Difference]: Start difference. First operand 246 states and 653 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:32,261 INFO L93 Difference]: Finished difference Result 334 states and 814 transitions. [2021-06-12 19:52:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:52:32,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:32,262 INFO L225 Difference]: With dead ends: 334 [2021-06-12 19:52:32,262 INFO L226 Difference]: Without dead ends: 327 [2021-06-12 19:52:32,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1071.5ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:52:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-12 19:52:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 246. [2021-06-12 19:52:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6897959183673468) internal successors, (659), 245 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 659 transitions. [2021-06-12 19:52:32,265 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 659 transitions. Word has length 16 [2021-06-12 19:52:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:32,265 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 659 transitions. [2021-06-12 19:52:32,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 659 transitions. [2021-06-12 19:52:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:32,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:32,266 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:32,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable782 [2021-06-12 19:52:32,466 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:32,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1091132056, now seen corresponding path program 131 times [2021-06-12 19:52:32,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:32,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586104385] [2021-06-12 19:52:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:32,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:32,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586104385] [2021-06-12 19:52:32,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586104385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:32,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455864728] [2021-06-12 19:52:32,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:32,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:52:32,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:32,795 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:52:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:33,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:33,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:33,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-12 19:52:33,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:33,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2021-06-12 19:52:33,263 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,349 INFO L628 ElimStorePlain]: treesize reduction 95, result has 45.4 percent of original size [2021-06-12 19:52:33,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:33,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:52:33,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:33,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:33,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:33,378 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:301, output treesize:56 [2021-06-12 19:52:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:33,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455864728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:33,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:33,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:52:33,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035277165] [2021-06-12 19:52:33,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:52:33,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:33,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:52:33,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:33,473 INFO L87 Difference]: Start difference. First operand 246 states and 659 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:33,848 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-12 19:52:34,183 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-12 19:52:34,346 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-12 19:52:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:34,643 INFO L93 Difference]: Finished difference Result 358 states and 879 transitions. [2021-06-12 19:52:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:52:34,643 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:34,643 INFO L225 Difference]: With dead ends: 358 [2021-06-12 19:52:34,644 INFO L226 Difference]: Without dead ends: 351 [2021-06-12 19:52:34,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1550.6ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:52:34,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-12 19:52:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 258. [2021-06-12 19:52:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.7315175097276265) internal successors, (702), 257 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:34,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 702 transitions. [2021-06-12 19:52:34,646 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 702 transitions. Word has length 16 [2021-06-12 19:52:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:34,646 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 702 transitions. [2021-06-12 19:52:34,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 702 transitions. [2021-06-12 19:52:34,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:34,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:34,647 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:34,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-06-12 19:52:34,847 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:34,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1714430244, now seen corresponding path program 132 times [2021-06-12 19:52:34,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:34,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884495923] [2021-06-12 19:52:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:35,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:35,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884495923] [2021-06-12 19:52:35,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884495923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:35,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057304281] [2021-06-12 19:52:35,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:35,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:35,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:35,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:52:35,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:35,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:35,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-12 19:52:35,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:35,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:35,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 41 [2021-06-12 19:52:35,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:35,583 INFO L628 ElimStorePlain]: treesize reduction 85, result has 43.3 percent of original size [2021-06-12 19:52:35,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:52:35,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:35,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:35,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:35,610 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:273, output treesize:54 [2021-06-12 19:52:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:35,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057304281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:35,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:35,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:52:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357773307] [2021-06-12 19:52:35,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:35,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:35,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:35,691 INFO L87 Difference]: Start difference. First operand 258 states and 702 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:36,447 INFO L93 Difference]: Finished difference Result 317 states and 820 transitions. [2021-06-12 19:52:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:52:36,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:36,448 INFO L225 Difference]: With dead ends: 317 [2021-06-12 19:52:36,448 INFO L226 Difference]: Without dead ends: 309 [2021-06-12 19:52:36,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1062.3ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:52:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-12 19:52:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 264. [2021-06-12 19:52:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2021-06-12 19:52:36,451 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 16 [2021-06-12 19:52:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:36,451 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2021-06-12 19:52:36,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2021-06-12 19:52:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:36,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:36,451 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:36,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:36,667 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:36,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1507451672, now seen corresponding path program 133 times [2021-06-12 19:52:36,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:36,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102585947] [2021-06-12 19:52:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:36,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:36,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102585947] [2021-06-12 19:52:36,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102585947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:36,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561111769] [2021-06-12 19:52:36,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:36,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:37,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:37,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:37,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:37,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:37,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:37,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,431 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-12 19:52:37,431 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:37,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_69 vanished before elimination [2021-06-12 19:52:37,432 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-06-12 19:52:37,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:37,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:52:37,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:37,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561111769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:37,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:37,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 19:52:37,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517313826] [2021-06-12 19:52:37,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:37,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:37,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:37,442 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:38,496 INFO L93 Difference]: Finished difference Result 331 states and 859 transitions. [2021-06-12 19:52:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:52:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:38,497 INFO L225 Difference]: With dead ends: 331 [2021-06-12 19:52:38,497 INFO L226 Difference]: Without dead ends: 327 [2021-06-12 19:52:38,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1233.6ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:52:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-12 19:52:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 264. [2021-06-12 19:52:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7338403041825097) internal successors, (719), 263 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 719 transitions. [2021-06-12 19:52:38,500 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 719 transitions. Word has length 16 [2021-06-12 19:52:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:38,500 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 719 transitions. [2021-06-12 19:52:38,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 719 transitions. [2021-06-12 19:52:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:38,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:38,500 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:38,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable834 [2021-06-12 19:52:38,701 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash 608535494, now seen corresponding path program 134 times [2021-06-12 19:52:38,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:38,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45054936] [2021-06-12 19:52:38,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:39,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:39,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:39,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45054936] [2021-06-12 19:52:39,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45054936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:39,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120830995] [2021-06-12 19:52:39,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:39,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:39,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:39,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:52:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:39,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:39,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-12 19:52:39,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:52:39,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 19:52:39,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:39,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:39,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:52:39,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,800 INFO L628 ElimStorePlain]: treesize reduction 77, result has 16.3 percent of original size [2021-06-12 19:52:39,801 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:39,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:39,801 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:181, output treesize:11 [2021-06-12 19:52:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:39,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120830995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:39,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:39,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 19:52:39,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507400999] [2021-06-12 19:52:39,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:52:39,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:52:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:39,830 INFO L87 Difference]: Start difference. First operand 264 states and 719 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:40,624 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-06-12 19:52:40,853 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2021-06-12 19:52:41,197 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2021-06-12 19:52:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:41,320 INFO L93 Difference]: Finished difference Result 355 states and 883 transitions. [2021-06-12 19:52:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:52:41,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:41,320 INFO L225 Difference]: With dead ends: 355 [2021-06-12 19:52:41,321 INFO L226 Difference]: Without dead ends: 342 [2021-06-12 19:52:41,321 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1961.9ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:52:41,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-12 19:52:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 286. [2021-06-12 19:52:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.7578947368421054) internal successors, (786), 285 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 786 transitions. [2021-06-12 19:52:41,324 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 786 transitions. Word has length 16 [2021-06-12 19:52:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:41,324 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 786 transitions. [2021-06-12 19:52:41,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:41,324 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 786 transitions. [2021-06-12 19:52:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:41,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:41,324 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:41,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-12 19:52:41,525 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 855908230, now seen corresponding path program 135 times [2021-06-12 19:52:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:41,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007519702] [2021-06-12 19:52:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:41,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:41,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007519702] [2021-06-12 19:52:41,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007519702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:41,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484432167] [2021-06-12 19:52:41,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:41,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:52:41,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:41,673 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:42,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:42,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:42,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 19:52:42,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:42,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:42,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:52:42,190 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:42,203 INFO L628 ElimStorePlain]: treesize reduction 91, result has 10.8 percent of original size [2021-06-12 19:52:42,203 INFO L518 ElimStorePlain]: Eliminatee v_prenex_71 vanished before elimination [2021-06-12 19:52:42,203 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:52:42,203 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:42,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:42,204 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-12 19:52:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:42,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484432167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:42,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:42,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 19:52:42,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258508228] [2021-06-12 19:52:42,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:52:42,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:42,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:52:42,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:52:42,214 INFO L87 Difference]: Start difference. First operand 286 states and 786 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:42,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:42,964 INFO L93 Difference]: Finished difference Result 346 states and 891 transitions. [2021-06-12 19:52:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:52:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:42,965 INFO L225 Difference]: With dead ends: 346 [2021-06-12 19:52:42,965 INFO L226 Difference]: Without dead ends: 342 [2021-06-12 19:52:42,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1018.0ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-12 19:52:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 275. [2021-06-12 19:52:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.7445255474452557) internal successors, (752), 274 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 752 transitions. [2021-06-12 19:52:42,968 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 752 transitions. Word has length 16 [2021-06-12 19:52:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:42,968 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 752 transitions. [2021-06-12 19:52:42,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 752 transitions. [2021-06-12 19:52:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:42,968 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:42,968 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:43,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-06-12 19:52:43,169 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:43,169 INFO L82 PathProgramCache]: Analyzing trace with hash 827171624, now seen corresponding path program 136 times [2021-06-12 19:52:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:43,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618358953] [2021-06-12 19:52:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:43,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618358953] [2021-06-12 19:52:43,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618358953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:43,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693737213] [2021-06-12 19:52:43,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:43,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:43,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:43,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:43,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:52:43,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:52:43,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:43,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 19:52:43,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,847 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-12 19:52:43,848 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:43,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:43,848 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-12 19:52:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:43,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693737213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:43,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:43,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:52:43,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865805786] [2021-06-12 19:52:43,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:52:43,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:52:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:43,871 INFO L87 Difference]: Start difference. First operand 275 states and 752 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:44,482 INFO L93 Difference]: Finished difference Result 399 states and 1002 transitions. [2021-06-12 19:52:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:52:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:44,483 INFO L225 Difference]: With dead ends: 399 [2021-06-12 19:52:44,483 INFO L226 Difference]: Without dead ends: 396 [2021-06-12 19:52:44,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 757.2ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:52:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-12 19:52:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 307. [2021-06-12 19:52:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.810457516339869) internal successors, (860), 306 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 860 transitions. [2021-06-12 19:52:44,486 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 860 transitions. Word has length 16 [2021-06-12 19:52:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:44,486 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 860 transitions. [2021-06-12 19:52:44,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 860 transitions. [2021-06-12 19:52:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:44,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:44,487 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:44,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:44,687 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:44,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:44,687 INFO L82 PathProgramCache]: Analyzing trace with hash 418582406, now seen corresponding path program 137 times [2021-06-12 19:52:44,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:44,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108856043] [2021-06-12 19:52:44,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:44,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:44,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108856043] [2021-06-12 19:52:44,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108856043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:44,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951357124] [2021-06-12 19:52:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:44,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:52:44,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:44,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:45,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:45,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:45,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:45,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:45,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:45,284 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-06-12 19:52:45,284 INFO L518 ElimStorePlain]: Eliminatee v_prenex_75 vanished before elimination [2021-06-12 19:52:45,284 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:45,284 INFO L518 ElimStorePlain]: Eliminatee v_prenex_74 vanished before elimination [2021-06-12 19:52:45,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:45,285 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:52:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:45,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951357124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:45,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:45,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:52:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720244744] [2021-06-12 19:52:45,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:45,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:45,295 INFO L87 Difference]: Start difference. First operand 307 states and 860 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:45,950 INFO L93 Difference]: Finished difference Result 349 states and 941 transitions. [2021-06-12 19:52:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:52:45,951 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:45,951 INFO L225 Difference]: With dead ends: 349 [2021-06-12 19:52:45,951 INFO L226 Difference]: Without dead ends: 346 [2021-06-12 19:52:45,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 776.1ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:52:45,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-12 19:52:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 307. [2021-06-12 19:52:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.810457516339869) internal successors, (860), 306 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 860 transitions. [2021-06-12 19:52:45,955 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 860 transitions. Word has length 16 [2021-06-12 19:52:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:45,955 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 860 transitions. [2021-06-12 19:52:45,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 860 transitions. [2021-06-12 19:52:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:45,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:45,955 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:46,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable924 [2021-06-12 19:52:46,172 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:46,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:46,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1998264330, now seen corresponding path program 138 times [2021-06-12 19:52:46,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:46,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026015090] [2021-06-12 19:52:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:46,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:46,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026015090] [2021-06-12 19:52:46,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026015090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:46,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353126501] [2021-06-12 19:52:46,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:46,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:46,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:46,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:52:46,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:46,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:46,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-06-12 19:52:46,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:46,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:46,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:52:46,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:47,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:47,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 19:52:47,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:47,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:47,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:47,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:52:47,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:47,025 INFO L628 ElimStorePlain]: treesize reduction 87, result has 14.7 percent of original size [2021-06-12 19:52:47,026 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:47,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:47,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:189, output treesize:11 [2021-06-12 19:52:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:47,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353126501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:47,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:47,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 19:52:47,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179880660] [2021-06-12 19:52:47,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:52:47,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:47,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:52:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:52:47,054 INFO L87 Difference]: Start difference. First operand 307 states and 860 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:47,522 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-12 19:52:47,732 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-06-12 19:52:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:47,907 INFO L93 Difference]: Finished difference Result 351 states and 930 transitions. [2021-06-12 19:52:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:52:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:47,908 INFO L225 Difference]: With dead ends: 351 [2021-06-12 19:52:47,908 INFO L226 Difference]: Without dead ends: 348 [2021-06-12 19:52:47,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1184.9ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-12 19:52:47,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 320. [2021-06-12 19:52:47,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.793103448275862) internal successors, (891), 319 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 891 transitions. [2021-06-12 19:52:47,911 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 891 transitions. Word has length 16 [2021-06-12 19:52:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:47,911 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 891 transitions. [2021-06-12 19:52:47,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:47,911 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 891 transitions. [2021-06-12 19:52:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:47,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:47,912 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:48,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-12 19:52:48,128 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:48,129 INFO L82 PathProgramCache]: Analyzing trace with hash 837242216, now seen corresponding path program 139 times [2021-06-12 19:52:48,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:48,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523609034] [2021-06-12 19:52:48,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:48,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:48,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523609034] [2021-06-12 19:52:48,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523609034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:48,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085094371] [2021-06-12 19:52:48,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:48,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:48,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:48,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:48,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-12 19:52:48,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:52:48,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:48,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:48,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:52:48,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,750 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-12 19:52:48,750 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:48,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:48,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-06-12 19:52:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:48,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085094371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:48,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:48,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 19:52:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431214596] [2021-06-12 19:52:48,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:52:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:52:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:52:48,759 INFO L87 Difference]: Start difference. First operand 320 states and 891 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:49,245 INFO L93 Difference]: Finished difference Result 409 states and 1057 transitions. [2021-06-12 19:52:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:52:49,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:49,246 INFO L225 Difference]: With dead ends: 409 [2021-06-12 19:52:49,246 INFO L226 Difference]: Without dead ends: 397 [2021-06-12 19:52:49,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 686.3ms TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:52:49,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-12 19:52:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 340. [2021-06-12 19:52:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.814159292035398) internal successors, (954), 339 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 954 transitions. [2021-06-12 19:52:49,250 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 954 transitions. Word has length 16 [2021-06-12 19:52:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:49,250 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 954 transitions. [2021-06-12 19:52:49,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 954 transitions. [2021-06-12 19:52:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:49,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:49,250 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:49,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-12 19:52:49,451 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:49,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1084614952, now seen corresponding path program 140 times [2021-06-12 19:52:49,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:49,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392276978] [2021-06-12 19:52:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:49,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392276978] [2021-06-12 19:52:49,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392276978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:49,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724405449] [2021-06-12 19:52:49,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:49,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:52:49,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:49,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:49,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:50,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:50,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:50,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:52:50,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:50,341 INFO L628 ElimStorePlain]: treesize reduction 121, result has 8.3 percent of original size [2021-06-12 19:52:50,341 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:50,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_78 vanished before elimination [2021-06-12 19:52:50,341 INFO L518 ElimStorePlain]: Eliminatee v_prenex_77 vanished before elimination [2021-06-12 19:52:50,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:50,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-12 19:52:50,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:50,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724405449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:50,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:50,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 19:52:50,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893230107] [2021-06-12 19:52:50,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:52:50,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:50,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:52:50,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:50,373 INFO L87 Difference]: Start difference. First operand 340 states and 954 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:50,952 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2021-06-12 19:52:51,099 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-06-12 19:52:51,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:51,432 INFO L93 Difference]: Finished difference Result 396 states and 1057 transitions. [2021-06-12 19:52:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:52:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:51,433 INFO L225 Difference]: With dead ends: 396 [2021-06-12 19:52:51,433 INFO L226 Difference]: Without dead ends: 390 [2021-06-12 19:52:51,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1453.7ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:52:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-12 19:52:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 348. [2021-06-12 19:52:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.8184438040345823) internal successors, (978), 347 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 978 transitions. [2021-06-12 19:52:51,437 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 978 transitions. Word has length 16 [2021-06-12 19:52:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:51,437 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 978 transitions. [2021-06-12 19:52:51,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 978 transitions. [2021-06-12 19:52:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:51,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:51,438 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:51,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-12 19:52:51,638 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:51,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash -425796252, now seen corresponding path program 141 times [2021-06-12 19:52:51,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:51,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136681103] [2021-06-12 19:52:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:51,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136681103] [2021-06-12 19:52:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136681103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441152893] [2021-06-12 19:52:51,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:51,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:52:51,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:51,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:51,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:52,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:52,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:52,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:52,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:52,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:52,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:52,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:52,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-12 19:52:52,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,448 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-06-12 19:52:52,448 INFO L518 ElimStorePlain]: Eliminatee v_prenex_80 vanished before elimination [2021-06-12 19:52:52,448 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:52:52,448 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:52,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:52,449 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:52:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:52,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441152893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:52,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:52,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:52:52,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467068076] [2021-06-12 19:52:52,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:52:52,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:52:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:52,479 INFO L87 Difference]: Start difference. First operand 348 states and 978 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:53,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:53,296 INFO L93 Difference]: Finished difference Result 395 states and 1079 transitions. [2021-06-12 19:52:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:52:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:53,297 INFO L225 Difference]: With dead ends: 395 [2021-06-12 19:52:53,297 INFO L226 Difference]: Without dead ends: 392 [2021-06-12 19:52:53,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1189.3ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-12 19:52:53,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 354. [2021-06-12 19:52:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.8158640226628897) internal successors, (994), 353 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 994 transitions. [2021-06-12 19:52:53,301 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 994 transitions. Word has length 16 [2021-06-12 19:52:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:53,301 INFO L482 AbstractCegarLoop]: Abstraction has 354 states and 994 transitions. [2021-06-12 19:52:53,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 994 transitions. [2021-06-12 19:52:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:53,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:53,301 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:53,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:53,517 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -3903320, now seen corresponding path program 142 times [2021-06-12 19:52:53,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:53,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256609872] [2021-06-12 19:52:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:53,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256609872] [2021-06-12 19:52:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256609872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:53,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593686111] [2021-06-12 19:52:53,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:53,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:52:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:53,667 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:53,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:54,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:54,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:54,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:54,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,085 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-06-12 19:52:54,085 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-12 19:52:54,085 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:54,085 INFO L518 ElimStorePlain]: Eliminatee v_prenex_85 vanished before elimination [2021-06-12 19:52:54,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:54,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:52:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:54,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593686111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:54,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:54,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:52:54,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002799922] [2021-06-12 19:52:54,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:52:54,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:54,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:52:54,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:52:54,096 INFO L87 Difference]: Start difference. First operand 354 states and 994 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:54,623 INFO L93 Difference]: Finished difference Result 454 states and 1186 transitions. [2021-06-12 19:52:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:54,624 INFO L225 Difference]: With dead ends: 454 [2021-06-12 19:52:54,624 INFO L226 Difference]: Without dead ends: 451 [2021-06-12 19:52:54,624 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:52:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-12 19:52:54,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 379. [2021-06-12 19:52:54,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.8439153439153437) internal successors, (1075), 378 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:54,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1075 transitions. [2021-06-12 19:52:54,628 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1075 transitions. Word has length 16 [2021-06-12 19:52:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:54,628 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1075 transitions. [2021-06-12 19:52:54,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1075 transitions. [2021-06-12 19:52:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:54,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:54,629 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:54,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1026 [2021-06-12 19:52:54,829 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:54,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:54,830 INFO L82 PathProgramCache]: Analyzing trace with hash 439009666, now seen corresponding path program 143 times [2021-06-12 19:52:54,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:54,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572339285] [2021-06-12 19:52:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:55,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:55,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572339285] [2021-06-12 19:52:55,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572339285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:55,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181506925] [2021-06-12 19:52:55,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:55,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:52:55,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:55,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:55,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:55,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:55,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:55,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:55,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:55,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,690 INFO L628 ElimStorePlain]: treesize reduction 129, result has 7.9 percent of original size [2021-06-12 19:52:55,690 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:52:55,690 INFO L518 ElimStorePlain]: Eliminatee v_prenex_91 vanished before elimination [2021-06-12 19:52:55,690 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:55,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:55,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:52:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:55,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181506925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:55,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:55,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:52:55,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582895968] [2021-06-12 19:52:55,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:52:55,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:55,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:52:55,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:52:55,716 INFO L87 Difference]: Start difference. First operand 379 states and 1075 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:56,408 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-06-12 19:52:56,604 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-06-12 19:52:56,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:56,742 INFO L93 Difference]: Finished difference Result 574 states and 1593 transitions. [2021-06-12 19:52:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:52:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:56,744 INFO L225 Difference]: With dead ends: 574 [2021-06-12 19:52:56,744 INFO L226 Difference]: Without dead ends: 571 [2021-06-12 19:52:56,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1387.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:52:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-12 19:52:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 384. [2021-06-12 19:52:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8407310704960835) internal successors, (1088), 383 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1088 transitions. [2021-06-12 19:52:56,748 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1088 transitions. Word has length 16 [2021-06-12 19:52:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:56,748 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1088 transitions. [2021-06-12 19:52:56,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1088 transitions. [2021-06-12 19:52:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:56,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:56,749 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:56,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:56,961 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1213943708, now seen corresponding path program 144 times [2021-06-12 19:52:56,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:56,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870870077] [2021-06-12 19:52:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:57,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:57,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870870077] [2021-06-12 19:52:57,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870870077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:57,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644973564] [2021-06-12 19:52:57,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:57,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:52:57,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:52:57,398 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:57,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:57,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-12 19:52:57,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,912 INFO L628 ElimStorePlain]: treesize reduction 80, result has 47.0 percent of original size [2021-06-12 19:52:57,912 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:57,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:57,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-12 19:52:57,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:57,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:57,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:52:57,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:57,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:52:57,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:52:57,941 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-06-12 19:52:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:57,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644973564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:57,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:52:57,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 19:52:57,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850609049] [2021-06-12 19:52:57,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:52:57,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:52:57,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:52:57,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:52:57,977 INFO L87 Difference]: Start difference. First operand 384 states and 1088 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:58,502 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-12 19:52:58,825 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 19:52:58,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:52:58,955 INFO L93 Difference]: Finished difference Result 456 states and 1250 transitions. [2021-06-12 19:52:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:52:58,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:52:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:52:58,956 INFO L225 Difference]: With dead ends: 456 [2021-06-12 19:52:58,956 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 19:52:58,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1333.1ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:52:58,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 19:52:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 384. [2021-06-12 19:52:58,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.8407310704960835) internal successors, (1088), 383 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1088 transitions. [2021-06-12 19:52:58,960 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1088 transitions. Word has length 16 [2021-06-12 19:52:58,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:52:58,960 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1088 transitions. [2021-06-12 19:52:58,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:52:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1088 transitions. [2021-06-12 19:52:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:52:58,960 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:52:58,960 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:52:59,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-12 19:52:59,161 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:52:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:52:59,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1920001474, now seen corresponding path program 145 times [2021-06-12 19:52:59,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:52:59,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795386082] [2021-06-12 19:52:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:52:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:52:59,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:52:59,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795386082] [2021-06-12 19:52:59,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795386082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:52:59,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980650348] [2021-06-12 19:52:59,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:52:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:52:59,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:52:59,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:52:59,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:59,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:59,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:52:59,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:59,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:52:59,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:52:59,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-12 19:52:59,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:52:59,985 INFO L628 ElimStorePlain]: treesize reduction 105, result has 9.5 percent of original size [2021-06-12 19:52:59,985 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:52:59,985 INFO L518 ElimStorePlain]: Eliminatee v_prenex_105 vanished before elimination [2021-06-12 19:52:59,985 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-12 19:52:59,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:52:59,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:53:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:00,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980650348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:00,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:00,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:53:00,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990010459] [2021-06-12 19:53:00,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:00,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:00,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:00,011 INFO L87 Difference]: Start difference. First operand 384 states and 1088 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:00,979 INFO L93 Difference]: Finished difference Result 466 states and 1272 transitions. [2021-06-12 19:53:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:53:00,979 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:00,979 INFO L225 Difference]: With dead ends: 466 [2021-06-12 19:53:00,979 INFO L226 Difference]: Without dead ends: 457 [2021-06-12 19:53:00,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1249.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:53:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-12 19:53:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 389. [2021-06-12 19:53:00,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.8376288659793816) internal successors, (1101), 388 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1101 transitions. [2021-06-12 19:53:00,983 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1101 transitions. Word has length 16 [2021-06-12 19:53:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:00,984 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 1101 transitions. [2021-06-12 19:53:00,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1101 transitions. [2021-06-12 19:53:00,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:00,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:00,984 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:01,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1073 [2021-06-12 19:53:01,185 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2135323484, now seen corresponding path program 146 times [2021-06-12 19:53:01,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:01,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148737672] [2021-06-12 19:53:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:01,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:01,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148737672] [2021-06-12 19:53:01,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148737672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:01,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845500810] [2021-06-12 19:53:01,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:01,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:01,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:01,470 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:01,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:01,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:01,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:01,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:01,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:01,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:53:01,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,994 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-12 19:53:01,994 INFO L518 ElimStorePlain]: Eliminatee v_prenex_109 vanished before elimination [2021-06-12 19:53:01,994 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:53:01,994 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:01,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:01,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:53:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:02,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845500810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:02,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:02,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:53:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430816571] [2021-06-12 19:53:02,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:02,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:02,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:02,022 INFO L87 Difference]: Start difference. First operand 389 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:02,880 INFO L93 Difference]: Finished difference Result 505 states and 1344 transitions. [2021-06-12 19:53:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:02,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:02,881 INFO L225 Difference]: With dead ends: 505 [2021-06-12 19:53:02,881 INFO L226 Difference]: Without dead ends: 501 [2021-06-12 19:53:02,881 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1233.9ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:53:02,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-12 19:53:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 403. [2021-06-12 19:53:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.853233830845771) internal successors, (1147), 402 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1147 transitions. [2021-06-12 19:53:02,885 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1147 transitions. Word has length 16 [2021-06-12 19:53:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:02,886 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1147 transitions. [2021-06-12 19:53:02,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1147 transitions. [2021-06-12 19:53:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:02,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:02,886 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:03,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1088 [2021-06-12 19:53:03,087 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2127593086, now seen corresponding path program 147 times [2021-06-12 19:53:03,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:03,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765164043] [2021-06-12 19:53:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:03,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:03,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765164043] [2021-06-12 19:53:03,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765164043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:03,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745273201] [2021-06-12 19:53:03,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:03,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:53:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:03,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:53:03,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:03,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-06-12 19:53:03,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:03,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-12 19:53:03,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:03,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:03,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:03,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:03,841 INFO L628 ElimStorePlain]: treesize reduction 95, result has 39.9 percent of original size [2021-06-12 19:53:03,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:03,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:53:03,850 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:53:03,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:03,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:03,872 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:265, output treesize:58 [2021-06-12 19:53:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:03,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745273201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:03,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:03,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:53:03,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259906003] [2021-06-12 19:53:03,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:53:03,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:03,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:53:03,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:03,961 INFO L87 Difference]: Start difference. First operand 403 states and 1147 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:04,925 INFO L93 Difference]: Finished difference Result 553 states and 1482 transitions. [2021-06-12 19:53:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:53:04,926 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:04,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:04,927 INFO L225 Difference]: With dead ends: 553 [2021-06-12 19:53:04,927 INFO L226 Difference]: Without dead ends: 546 [2021-06-12 19:53:04,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1231.1ms TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:53:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-12 19:53:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 427. [2021-06-12 19:53:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.887323943661972) internal successors, (1230), 426 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1230 transitions. [2021-06-12 19:53:04,931 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1230 transitions. Word has length 16 [2021-06-12 19:53:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:04,931 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1230 transitions. [2021-06-12 19:53:04,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1230 transitions. [2021-06-12 19:53:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:04,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:04,932 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:05,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1107 [2021-06-12 19:53:05,132 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:05,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:05,132 INFO L82 PathProgramCache]: Analyzing trace with hash -328145428, now seen corresponding path program 148 times [2021-06-12 19:53:05,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:05,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493812585] [2021-06-12 19:53:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:05,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:05,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493812585] [2021-06-12 19:53:05,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493812585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:05,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526805766] [2021-06-12 19:53:05,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:05,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:05,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:05,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:05,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:05,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:05,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:05,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:05,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:53:05,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:05,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:05,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:05,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-12 19:53:05,995 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:06,033 INFO L628 ElimStorePlain]: treesize reduction 84, result has 46.2 percent of original size [2021-06-12 19:53:06,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:06,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:53:06,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:06,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:06,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:06,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:06,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2021-06-12 19:53:06,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:06,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:06,064 INFO L518 ElimStorePlain]: Eliminatee v_prenex_116 vanished before elimination [2021-06-12 19:53:06,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:06,065 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-06-12 19:53:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:06,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526805766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:06,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:06,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 19:53:06,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067218786] [2021-06-12 19:53:06,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:53:06,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:53:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:06,099 INFO L87 Difference]: Start difference. First operand 427 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:07,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:07,109 INFO L93 Difference]: Finished difference Result 468 states and 1314 transitions. [2021-06-12 19:53:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:53:07,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:07,110 INFO L225 Difference]: With dead ends: 468 [2021-06-12 19:53:07,110 INFO L226 Difference]: Without dead ends: 465 [2021-06-12 19:53:07,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1335.7ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:53:07,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-12 19:53:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2021-06-12 19:53:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.887323943661972) internal successors, (1230), 426 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:07,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1230 transitions. [2021-06-12 19:53:07,114 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1230 transitions. Word has length 16 [2021-06-12 19:53:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:07,114 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1230 transitions. [2021-06-12 19:53:07,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1230 transitions. [2021-06-12 19:53:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:07,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:07,115 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:07,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:07,332 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:07,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:07,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1249525204, now seen corresponding path program 149 times [2021-06-12 19:53:07,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:07,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954378863] [2021-06-12 19:53:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:07,706 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2021-06-12 19:53:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:07,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:07,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954378863] [2021-06-12 19:53:07,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954378863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:07,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888874034] [2021-06-12 19:53:07,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:07,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:53:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:07,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:08,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:08,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:08,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:08,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:08,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:53:08,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,407 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-12 19:53:08,407 INFO L518 ElimStorePlain]: Eliminatee v_prenex_119 vanished before elimination [2021-06-12 19:53:08,407 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:53:08,408 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:08,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:08,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:53:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:08,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888874034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:08,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:08,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 19:53:08,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94603214] [2021-06-12 19:53:08,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:53:08,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:08,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:53:08,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:08,434 INFO L87 Difference]: Start difference. First operand 427 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:09,458 INFO L93 Difference]: Finished difference Result 507 states and 1380 transitions. [2021-06-12 19:53:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:09,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:09,459 INFO L225 Difference]: With dead ends: 507 [2021-06-12 19:53:09,459 INFO L226 Difference]: Without dead ends: 501 [2021-06-12 19:53:09,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1609.2ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:53:09,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-12 19:53:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 428. [2021-06-12 19:53:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.88056206088993) internal successors, (1230), 427 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:09,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1230 transitions. [2021-06-12 19:53:09,464 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1230 transitions. Word has length 16 [2021-06-12 19:53:09,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:09,464 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1230 transitions. [2021-06-12 19:53:09,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:09,464 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1230 transitions. [2021-06-12 19:53:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:09,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:09,464 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:09,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1135,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:09,665 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1241794806, now seen corresponding path program 150 times [2021-06-12 19:53:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:09,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249655942] [2021-06-12 19:53:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:09,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:09,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:09,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:09,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249655942] [2021-06-12 19:53:09,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249655942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:09,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233676043] [2021-06-12 19:53:09,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:09,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:09,901 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:09,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:10,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 19:53:10,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:10,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:10,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:10,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:10,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,352 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-12 19:53:10,352 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:10,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:10,352 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:161, output treesize:11 [2021-06-12 19:53:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:10,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233676043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:10,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:10,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:10,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379603848] [2021-06-12 19:53:10,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:10,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:10,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:10,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:10,376 INFO L87 Difference]: Start difference. First operand 428 states and 1230 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:10,937 INFO L93 Difference]: Finished difference Result 545 states and 1456 transitions. [2021-06-12 19:53:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:53:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:10,938 INFO L225 Difference]: With dead ends: 545 [2021-06-12 19:53:10,938 INFO L226 Difference]: Without dead ends: 541 [2021-06-12 19:53:10,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 742.2ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:10,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-06-12 19:53:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 426. [2021-06-12 19:53:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.8823529411764706) internal successors, (1225), 425 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1225 transitions. [2021-06-12 19:53:10,942 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1225 transitions. Word has length 16 [2021-06-12 19:53:10,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:10,942 INFO L482 AbstractCegarLoop]: Abstraction has 426 states and 1225 transitions. [2021-06-12 19:53:10,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1225 transitions. [2021-06-12 19:53:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:10,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:10,943 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:11,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1153,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:11,144 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:11,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1711708166, now seen corresponding path program 151 times [2021-06-12 19:53:11,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:11,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443346614] [2021-06-12 19:53:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:11,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443346614] [2021-06-12 19:53:11,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443346614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:11,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369138391] [2021-06-12 19:53:11,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:11,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:11,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:11,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:11,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-12 19:53:11,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:11,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:11,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:11,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:53:11,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,908 INFO L628 ElimStorePlain]: treesize reduction 99, result has 10.0 percent of original size [2021-06-12 19:53:11,909 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:11,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_123 vanished before elimination [2021-06-12 19:53:11,909 INFO L518 ElimStorePlain]: Eliminatee v_prenex_124 vanished before elimination [2021-06-12 19:53:11,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:11,909 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:53:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:11,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369138391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:11,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:11,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 19:53:11,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646387637] [2021-06-12 19:53:11,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:11,918 INFO L87 Difference]: Start difference. First operand 426 states and 1225 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:12,488 INFO L93 Difference]: Finished difference Result 489 states and 1343 transitions. [2021-06-12 19:53:12,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:12,489 INFO L225 Difference]: With dead ends: 489 [2021-06-12 19:53:12,489 INFO L226 Difference]: Without dead ends: 481 [2021-06-12 19:53:12,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 857.6ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:12,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-12 19:53:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 429. [2021-06-12 19:53:12,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.8621495327102804) internal successors, (1225), 428 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1225 transitions. [2021-06-12 19:53:12,494 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1225 transitions. Word has length 16 [2021-06-12 19:53:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:12,494 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1225 transitions. [2021-06-12 19:53:12,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1225 transitions. [2021-06-12 19:53:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:12,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:12,495 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:12,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:12,695 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1270531412, now seen corresponding path program 152 times [2021-06-12 19:53:12,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:12,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116086492] [2021-06-12 19:53:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:12,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116086492] [2021-06-12 19:53:12,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116086492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:12,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815213088] [2021-06-12 19:53:12,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:12,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:12,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:12,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:13,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:13,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:13,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:13,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:13,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:13,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:13,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 19:53:13,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,474 INFO L628 ElimStorePlain]: treesize reduction 91, result has 10.8 percent of original size [2021-06-12 19:53:13,475 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:13,475 INFO L518 ElimStorePlain]: Eliminatee v_prenex_126 vanished before elimination [2021-06-12 19:53:13,475 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-06-12 19:53:13,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:13,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-12 19:53:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:13,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815213088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:13,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:13,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 19:53:13,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050293204] [2021-06-12 19:53:13,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:13,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:13,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:13,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:13,498 INFO L87 Difference]: Start difference. First operand 429 states and 1225 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:14,126 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 19:53:14,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:14,210 INFO L93 Difference]: Finished difference Result 495 states and 1336 transitions. [2021-06-12 19:53:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:14,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:14,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:14,211 INFO L225 Difference]: With dead ends: 495 [2021-06-12 19:53:14,211 INFO L226 Difference]: Without dead ends: 489 [2021-06-12 19:53:14,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1075.3ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:53:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-12 19:53:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 428. [2021-06-12 19:53:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.857142857142857) internal successors, (1220), 427 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1220 transitions. [2021-06-12 19:53:14,216 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1220 transitions. Word has length 16 [2021-06-12 19:53:14,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:14,216 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1220 transitions. [2021-06-12 19:53:14,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1220 transitions. [2021-06-12 19:53:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:14,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:14,216 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:14,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:14,417 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:14,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1542761286, now seen corresponding path program 153 times [2021-06-12 19:53:14,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:14,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946820384] [2021-06-12 19:53:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:14,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:14,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946820384] [2021-06-12 19:53:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946820384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:14,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485658024] [2021-06-12 19:53:14,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:14,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:14,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:14,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:14,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 19:53:15,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:53:15,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-12 19:53:15,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:53:15,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,494 INFO L628 ElimStorePlain]: treesize reduction 51, result has 50.0 percent of original size [2021-06-12 19:53:15,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:15,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:53:15,497 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:15,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:15,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:15,509 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 5 variables, input treesize:189, output treesize:22 [2021-06-12 19:53:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:15,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485658024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:15,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:15,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 19:53:15,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737959789] [2021-06-12 19:53:15,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:53:15,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:15,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:53:15,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:15,544 INFO L87 Difference]: Start difference. First operand 428 states and 1220 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:15,987 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2021-06-12 19:53:16,463 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 19:53:17,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:17,436 INFO L93 Difference]: Finished difference Result 492 states and 1349 transitions. [2021-06-12 19:53:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:53:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:17,437 INFO L225 Difference]: With dead ends: 492 [2021-06-12 19:53:17,437 INFO L226 Difference]: Without dead ends: 486 [2021-06-12 19:53:17,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 2408.7ms TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:53:17,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-12 19:53:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 432. [2021-06-12 19:53:17,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.8538283062645013) internal successors, (1230), 431 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:17,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1230 transitions. [2021-06-12 19:53:17,441 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1230 transitions. Word has length 16 [2021-06-12 19:53:17,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:17,441 INFO L482 AbstractCegarLoop]: Abstraction has 432 states and 1230 transitions. [2021-06-12 19:53:17,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:17,442 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1230 transitions. [2021-06-12 19:53:17,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:17,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:17,442 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:17,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-12 19:53:17,644 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1361797476, now seen corresponding path program 154 times [2021-06-12 19:53:17,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:17,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917058024] [2021-06-12 19:53:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:17,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917058024] [2021-06-12 19:53:17,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917058024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:17,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987688634] [2021-06-12 19:53:17,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:18,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:18,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:18,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:18,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:53:18,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-06-12 19:53:18,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,547 INFO L628 ElimStorePlain]: treesize reduction 84, result has 45.8 percent of original size [2021-06-12 19:53:18,547 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:18,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:18,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2021-06-12 19:53:18,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:18,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:18,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:18,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:53:18,576 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:53:18,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:18,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:18,587 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:213, output treesize:22 [2021-06-12 19:53:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:18,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987688634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:18,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:18,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-06-12 19:53:18,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21460213] [2021-06-12 19:53:18,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:53:18,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:18,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:53:18,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:18,622 INFO L87 Difference]: Start difference. First operand 432 states and 1230 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:19,529 INFO L93 Difference]: Finished difference Result 460 states and 1282 transitions. [2021-06-12 19:53:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:53:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:19,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:19,530 INFO L225 Difference]: With dead ends: 460 [2021-06-12 19:53:19,530 INFO L226 Difference]: Without dead ends: 457 [2021-06-12 19:53:19,530 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1281.5ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:53:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-12 19:53:19,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 433. [2021-06-12 19:53:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.8541666666666665) internal successors, (1233), 432 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1233 transitions. [2021-06-12 19:53:19,535 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1233 transitions. Word has length 16 [2021-06-12 19:53:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:19,535 INFO L482 AbstractCegarLoop]: Abstraction has 433 states and 1233 transitions. [2021-06-12 19:53:19,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1233 transitions. [2021-06-12 19:53:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:19,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:19,536 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:19,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1230,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:19,749 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash 200775362, now seen corresponding path program 155 times [2021-06-12 19:53:19,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:19,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127860957] [2021-06-12 19:53:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:19,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:19,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127860957] [2021-06-12 19:53:19,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127860957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:19,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759602822] [2021-06-12 19:53:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:19,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:19,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:19,962 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:19,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:20,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:20,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:20,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:20,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:20,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:20,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:53:20,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:20,370 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-12 19:53:20,371 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:20,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-12 19:53:20,371 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-06-12 19:53:20,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:20,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:53:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:20,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759602822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:20,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:20,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-12 19:53:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349232361] [2021-06-12 19:53:20,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:20,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:20,382 INFO L87 Difference]: Start difference. First operand 433 states and 1233 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:20,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:20,907 INFO L93 Difference]: Finished difference Result 531 states and 1427 transitions. [2021-06-12 19:53:20,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:53:20,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:20,908 INFO L225 Difference]: With dead ends: 531 [2021-06-12 19:53:20,908 INFO L226 Difference]: Without dead ends: 520 [2021-06-12 19:53:20,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:20,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-12 19:53:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 424. [2021-06-12 19:53:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.8747044917257685) internal successors, (1216), 423 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1216 transitions. [2021-06-12 19:53:20,913 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1216 transitions. Word has length 16 [2021-06-12 19:53:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:20,913 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1216 transitions. [2021-06-12 19:53:20,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1216 transitions. [2021-06-12 19:53:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:20,914 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:20,914 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:21,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1251,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:21,114 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:21,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:21,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1062263106, now seen corresponding path program 156 times [2021-06-12 19:53:21,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:21,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703091378] [2021-06-12 19:53:21,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:21,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:21,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703091378] [2021-06-12 19:53:21,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703091378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:21,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713868619] [2021-06-12 19:53:21,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:21,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:21,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:21,639 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-06-12 19:53:21,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:53:21,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-06-12 19:53:21,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:53:21,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:21,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-12 19:53:21,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,951 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-12 19:53:21,951 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:21,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:21,952 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:189, output treesize:11 [2021-06-12 19:53:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:21,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713868619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:21,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:21,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:53:21,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196314618] [2021-06-12 19:53:21,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:21,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:21,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:21,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:21,981 INFO L87 Difference]: Start difference. First operand 424 states and 1216 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:22,934 INFO L93 Difference]: Finished difference Result 466 states and 1300 transitions. [2021-06-12 19:53:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:22,935 INFO L225 Difference]: With dead ends: 466 [2021-06-12 19:53:22,935 INFO L226 Difference]: Without dead ends: 463 [2021-06-12 19:53:22,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1293.6ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:53:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-12 19:53:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 423. [2021-06-12 19:53:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.876777251184834) internal successors, (1214), 422 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1214 transitions. [2021-06-12 19:53:22,939 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1214 transitions. Word has length 16 [2021-06-12 19:53:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:22,940 INFO L482 AbstractCegarLoop]: Abstraction has 423 states and 1214 transitions. [2021-06-12 19:53:22,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1214 transitions. [2021-06-12 19:53:22,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:22,940 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:22,940 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:23,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1267 [2021-06-12 19:53:23,141 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash -450417086, now seen corresponding path program 157 times [2021-06-12 19:53:23,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:23,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251954622] [2021-06-12 19:53:23,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:23,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:23,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:23,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251954622] [2021-06-12 19:53:23,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251954622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:23,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443536662] [2021-06-12 19:53:23,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:23,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:23,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:23,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:23,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:23,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:23,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-06-12 19:53:23,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,876 INFO L628 ElimStorePlain]: treesize reduction 133, result has 7.6 percent of original size [2021-06-12 19:53:23,876 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:23,876 INFO L518 ElimStorePlain]: Eliminatee v_prenex_141 vanished before elimination [2021-06-12 19:53:23,876 INFO L518 ElimStorePlain]: Eliminatee v_prenex_142 vanished before elimination [2021-06-12 19:53:23,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:23,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:173, output treesize:11 [2021-06-12 19:53:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:23,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443536662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:23,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:23,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-12 19:53:23,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081886553] [2021-06-12 19:53:23,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:23,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:23,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:23,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:23,899 INFO L87 Difference]: Start difference. First operand 423 states and 1214 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:24,393 INFO L93 Difference]: Finished difference Result 506 states and 1376 transitions. [2021-06-12 19:53:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:24,394 INFO L225 Difference]: With dead ends: 506 [2021-06-12 19:53:24,394 INFO L226 Difference]: Without dead ends: 500 [2021-06-12 19:53:24,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 761.9ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:24,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-12 19:53:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 434. [2021-06-12 19:53:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.884526558891455) internal successors, (1249), 433 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:24,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1249 transitions. [2021-06-12 19:53:24,402 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1249 transitions. Word has length 16 [2021-06-12 19:53:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:24,402 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1249 transitions. [2021-06-12 19:53:24,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:24,402 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1249 transitions. [2021-06-12 19:53:24,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:24,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:24,403 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:24,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:24,603 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash -231780956, now seen corresponding path program 158 times [2021-06-12 19:53:24,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:24,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631323173] [2021-06-12 19:53:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:24,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:24,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631323173] [2021-06-12 19:53:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631323173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:24,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298177617] [2021-06-12 19:53:24,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:24,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:24,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:53:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:25,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:25,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:25,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:25,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:25,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:25,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:25,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-12 19:53:25,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:25,272 INFO L628 ElimStorePlain]: treesize reduction 101, result has 9.8 percent of original size [2021-06-12 19:53:25,272 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:25,272 INFO L518 ElimStorePlain]: Eliminatee v_prenex_143 vanished before elimination [2021-06-12 19:53:25,272 INFO L518 ElimStorePlain]: Eliminatee v_prenex_144 vanished before elimination [2021-06-12 19:53:25,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:25,273 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:161, output treesize:11 [2021-06-12 19:53:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298177617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:25,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:25,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:53:25,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687049557] [2021-06-12 19:53:25,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:53:25,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:53:25,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:25,295 INFO L87 Difference]: Start difference. First operand 434 states and 1249 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:25,549 INFO L93 Difference]: Finished difference Result 554 states and 1503 transitions. [2021-06-12 19:53:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:53:25,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:25,550 INFO L225 Difference]: With dead ends: 554 [2021-06-12 19:53:25,550 INFO L226 Difference]: Without dead ends: 551 [2021-06-12 19:53:25,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:53:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-06-12 19:53:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 459. [2021-06-12 19:53:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.9017467248908297) internal successors, (1329), 458 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1329 transitions. [2021-06-12 19:53:25,555 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1329 transitions. Word has length 16 [2021-06-12 19:53:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:25,555 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1329 transitions. [2021-06-12 19:53:25,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1329 transitions. [2021-06-12 19:53:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:25,556 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:25,556 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:25,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-06-12 19:53:25,757 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1713455554, now seen corresponding path program 159 times [2021-06-12 19:53:25,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:25,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023306600] [2021-06-12 19:53:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:26,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023306600] [2021-06-12 19:53:26,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023306600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:26,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494300173] [2021-06-12 19:53:26,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:26,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:26,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:26,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-12 19:53:26,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:26,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-12 19:53:26,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:26,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-06-12 19:53:26,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:53:26,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-12 19:53:26,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:26,600 INFO L628 ElimStorePlain]: treesize reduction 105, result has 41.0 percent of original size [2021-06-12 19:53:26,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:26,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:53:26,608 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:53:26,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:53:26,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:26,634 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:285, output treesize:56 [2021-06-12 19:53:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:26,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494300173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:26,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:26,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:53:26,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41353999] [2021-06-12 19:53:26,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:53:26,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:53:26,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:26,706 INFO L87 Difference]: Start difference. First operand 459 states and 1329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:27,278 INFO L93 Difference]: Finished difference Result 495 states and 1394 transitions. [2021-06-12 19:53:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:27,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:27,279 INFO L225 Difference]: With dead ends: 495 [2021-06-12 19:53:27,279 INFO L226 Difference]: Without dead ends: 487 [2021-06-12 19:53:27,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 999.5ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-12 19:53:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 464. [2021-06-12 19:53:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.900647948164147) internal successors, (1343), 463 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1343 transitions. [2021-06-12 19:53:27,284 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1343 transitions. Word has length 16 [2021-06-12 19:53:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:27,284 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1343 transitions. [2021-06-12 19:53:27,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1343 transitions. [2021-06-12 19:53:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 19:53:27,285 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:27,285 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:27,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1329 [2021-06-12 19:53:27,485 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:27,486 INFO L82 PathProgramCache]: Analyzing trace with hash -640370174, now seen corresponding path program 160 times [2021-06-12 19:53:27,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:27,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481480778] [2021-06-12 19:53:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:27,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:27,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481480778] [2021-06-12 19:53:27,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481480778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:27,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947893122] [2021-06-12 19:53:27,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:27,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:27,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:27,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 19:53:27,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:53:27,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-06-12 19:53:27,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-06-12 19:53:27,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,981 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-12 19:53:27,981 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:27,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:27,981 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:149, output treesize:11 [2021-06-12 19:53:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:27,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947893122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:27,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:27,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 19:53:27,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351064361] [2021-06-12 19:53:27,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:27,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:27,991 INFO L87 Difference]: Start difference. First operand 464 states and 1343 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:28,487 INFO L93 Difference]: Finished difference Result 571 states and 1546 transitions. [2021-06-12 19:53:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:53:28,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 19:53:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:28,488 INFO L225 Difference]: With dead ends: 571 [2021-06-12 19:53:28,488 INFO L226 Difference]: Without dead ends: 567 [2021-06-12 19:53:28,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:53:28,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-12 19:53:28,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 441. [2021-06-12 19:53:28,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.8863636363636362) internal successors, (1270), 440 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1270 transitions. [2021-06-12 19:53:28,493 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1270 transitions. Word has length 16 [2021-06-12 19:53:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:28,493 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1270 transitions. [2021-06-12 19:53:28,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:28,493 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1270 transitions. [2021-06-12 19:53:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:28,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:28,494 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:28,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1350,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:28,694 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:28,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:28,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2002561658, now seen corresponding path program 161 times [2021-06-12 19:53:28,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:28,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122359079] [2021-06-12 19:53:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:28,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:28,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122359079] [2021-06-12 19:53:28,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122359079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:28,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152051399] [2021-06-12 19:53:28,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:28,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:28,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:28,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:28,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:28,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:28,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:28,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:28,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:28,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:28,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:28,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:28,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:28,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:28,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:28,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:28,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:28,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:28,958 INFO L628 ElimStorePlain]: treesize reduction 18, result has 52.6 percent of original size [2021-06-12 19:53:28,959 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:28,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:53:28,959 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 19:53:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:28,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152051399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:28,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:28,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:53:28,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591104709] [2021-06-12 19:53:28,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:28,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:28,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:28,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:28,985 INFO L87 Difference]: Start difference. First operand 441 states and 1270 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:29,307 INFO L93 Difference]: Finished difference Result 605 states and 1704 transitions. [2021-06-12 19:53:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:53:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:29,308 INFO L225 Difference]: With dead ends: 605 [2021-06-12 19:53:29,308 INFO L226 Difference]: Without dead ends: 594 [2021-06-12 19:53:29,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:53:29,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-12 19:53:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 438. [2021-06-12 19:53:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.8924485125858124) internal successors, (1264), 437 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1264 transitions. [2021-06-12 19:53:29,314 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1264 transitions. Word has length 17 [2021-06-12 19:53:29,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:29,314 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1264 transitions. [2021-06-12 19:53:29,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:29,314 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1264 transitions. [2021-06-12 19:53:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:29,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:29,315 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:29,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1378,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:29,515 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:29,515 INFO L82 PathProgramCache]: Analyzing trace with hash 464142156, now seen corresponding path program 162 times [2021-06-12 19:53:29,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:29,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775326451] [2021-06-12 19:53:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:29,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:29,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775326451] [2021-06-12 19:53:29,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775326451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:29,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801946641] [2021-06-12 19:53:29,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:29,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:29,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:29,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:29,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:29,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:29,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,735 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 19:53:29,735 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:29,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:29,736 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 19:53:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:29,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801946641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:29,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:29,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:53:29,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399149369] [2021-06-12 19:53:29,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:53:29,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:53:29,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:53:29,759 INFO L87 Difference]: Start difference. First operand 438 states and 1264 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:29,952 INFO L93 Difference]: Finished difference Result 606 states and 1712 transitions. [2021-06-12 19:53:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:29,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:29,953 INFO L225 Difference]: With dead ends: 606 [2021-06-12 19:53:29,953 INFO L226 Difference]: Without dead ends: 606 [2021-06-12 19:53:29,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-12 19:53:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 439. [2021-06-12 19:53:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.8926940639269407) internal successors, (1267), 438 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1267 transitions. [2021-06-12 19:53:29,958 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1267 transitions. Word has length 17 [2021-06-12 19:53:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:29,958 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1267 transitions. [2021-06-12 19:53:29,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1267 transitions. [2021-06-12 19:53:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:29,959 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:29,959 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:30,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:30,159 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:30,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:30,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2101260346, now seen corresponding path program 163 times [2021-06-12 19:53:30,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:30,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227158983] [2021-06-12 19:53:30,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:30,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:30,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227158983] [2021-06-12 19:53:30,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227158983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:30,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619283784] [2021-06-12 19:53:30,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:30,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:30,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:30,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:30,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:30,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:30,427 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:30,427 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:30,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:30,428 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:30,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619283784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:30,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:30,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:30,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584469614] [2021-06-12 19:53:30,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:30,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:30,479 INFO L87 Difference]: Start difference. First operand 439 states and 1267 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:30,759 INFO L93 Difference]: Finished difference Result 671 states and 1821 transitions. [2021-06-12 19:53:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:53:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:30,760 INFO L225 Difference]: With dead ends: 671 [2021-06-12 19:53:30,760 INFO L226 Difference]: Without dead ends: 671 [2021-06-12 19:53:30,760 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:53:30,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-12 19:53:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 449. [2021-06-12 19:53:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.904017857142857) internal successors, (1301), 448 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1301 transitions. [2021-06-12 19:53:30,766 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1301 transitions. Word has length 17 [2021-06-12 19:53:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:30,766 INFO L482 AbstractCegarLoop]: Abstraction has 449 states and 1301 transitions. [2021-06-12 19:53:30,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1301 transitions. [2021-06-12 19:53:30,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:30,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:30,766 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:30,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-12 19:53:30,983 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1392090722, now seen corresponding path program 164 times [2021-06-12 19:53:30,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:30,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834206458] [2021-06-12 19:53:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:31,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834206458] [2021-06-12 19:53:31,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834206458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:31,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578990873] [2021-06-12 19:53:31,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:31,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:31,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:31,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:31,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:31,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:31,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:31,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:31,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:31,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:31,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:31,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:31,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:31,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:31,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:31,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:31,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:31,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:31,220 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:31,252 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:31,252 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:31,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:31,253 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:31,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578990873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:31,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:31,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:31,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404652306] [2021-06-12 19:53:31,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:31,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:31,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:31,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:31,323 INFO L87 Difference]: Start difference. First operand 449 states and 1301 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:32,254 INFO L93 Difference]: Finished difference Result 687 states and 1849 transitions. [2021-06-12 19:53:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:53:32,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:32,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:32,255 INFO L225 Difference]: With dead ends: 687 [2021-06-12 19:53:32,255 INFO L226 Difference]: Without dead ends: 678 [2021-06-12 19:53:32,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 870.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:53:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-12 19:53:32,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 454. [2021-06-12 19:53:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 2.905077262693157) internal successors, (1316), 453 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1316 transitions. [2021-06-12 19:53:32,260 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1316 transitions. Word has length 17 [2021-06-12 19:53:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:32,261 INFO L482 AbstractCegarLoop]: Abstraction has 454 states and 1316 transitions. [2021-06-12 19:53:32,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1316 transitions. [2021-06-12 19:53:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:32,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:32,261 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:32,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-06-12 19:53:32,462 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:32,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:32,462 INFO L82 PathProgramCache]: Analyzing trace with hash 326252984, now seen corresponding path program 165 times [2021-06-12 19:53:32,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:32,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228136000] [2021-06-12 19:53:32,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:32,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228136000] [2021-06-12 19:53:32,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228136000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:32,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639052235] [2021-06-12 19:53:32,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:32,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:53:32,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:32,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:32,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:32,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:32,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:32,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:32,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:32,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:32,753 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:32,754 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:32,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:32,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639052235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:32,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:32,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141817413] [2021-06-12 19:53:32,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:32,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:32,803 INFO L87 Difference]: Start difference. First operand 454 states and 1316 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:33,385 INFO L93 Difference]: Finished difference Result 665 states and 1818 transitions. [2021-06-12 19:53:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:53:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:33,390 INFO L225 Difference]: With dead ends: 665 [2021-06-12 19:53:33,390 INFO L226 Difference]: Without dead ends: 665 [2021-06-12 19:53:33,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:53:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-06-12 19:53:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 450. [2021-06-12 19:53:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.893095768374165) internal successors, (1299), 449 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1299 transitions. [2021-06-12 19:53:33,395 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1299 transitions. Word has length 17 [2021-06-12 19:53:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:33,396 INFO L482 AbstractCegarLoop]: Abstraction has 450 states and 1299 transitions. [2021-06-12 19:53:33,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1299 transitions. [2021-06-12 19:53:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:33,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:33,396 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:33,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1395,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:33,609 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1384360324, now seen corresponding path program 166 times [2021-06-12 19:53:33,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:33,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917228049] [2021-06-12 19:53:33,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:33,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:33,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917228049] [2021-06-12 19:53:33,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917228049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:33,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758875085] [2021-06-12 19:53:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:33,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:33,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:33,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:33,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:33,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,885 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:33,885 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:33,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:33,886 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:33,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758875085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:33,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:33,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:33,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742997121] [2021-06-12 19:53:33,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:33,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:33,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:33,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:33,907 INFO L87 Difference]: Start difference. First operand 450 states and 1299 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:34,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:34,420 INFO L93 Difference]: Finished difference Result 719 states and 1930 transitions. [2021-06-12 19:53:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:53:34,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:34,421 INFO L225 Difference]: With dead ends: 719 [2021-06-12 19:53:34,421 INFO L226 Difference]: Without dead ends: 719 [2021-06-12 19:53:34,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:53:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-06-12 19:53:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 459. [2021-06-12 19:53:34,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.906113537117904) internal successors, (1331), 458 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1331 transitions. [2021-06-12 19:53:34,427 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1331 transitions. Word has length 17 [2021-06-12 19:53:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:34,427 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 1331 transitions. [2021-06-12 19:53:34,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1331 transitions. [2021-06-12 19:53:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:34,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:34,428 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:34,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-06-12 19:53:34,644 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1421201976, now seen corresponding path program 167 times [2021-06-12 19:53:34,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:34,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229961631] [2021-06-12 19:53:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:34,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:34,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229961631] [2021-06-12 19:53:34,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229961631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:34,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829201728] [2021-06-12 19:53:34,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:34,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:34,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:34,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:34,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:34,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:34,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:34,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:34,907 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:34,907 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:34,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:34,908 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:34,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829201728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:34,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:34,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:34,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362267670] [2021-06-12 19:53:34,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:34,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:34,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:34,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:34,928 INFO L87 Difference]: Start difference. First operand 459 states and 1331 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:35,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:35,418 INFO L93 Difference]: Finished difference Result 675 states and 1881 transitions. [2021-06-12 19:53:35,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:53:35,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:35,419 INFO L225 Difference]: With dead ends: 675 [2021-06-12 19:53:35,419 INFO L226 Difference]: Without dead ends: 675 [2021-06-12 19:53:35,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:53:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-12 19:53:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 461. [2021-06-12 19:53:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.9065217391304348) internal successors, (1337), 460 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1337 transitions. [2021-06-12 19:53:35,431 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1337 transitions. Word has length 17 [2021-06-12 19:53:35,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:35,431 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1337 transitions. [2021-06-12 19:53:35,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:35,431 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1337 transitions. [2021-06-12 19:53:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:35,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:35,432 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:35,632 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:35,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:35,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1800679940, now seen corresponding path program 168 times [2021-06-12 19:53:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:35,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327741417] [2021-06-12 19:53:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:35,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:35,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327741417] [2021-06-12 19:53:35,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327741417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:35,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712556155] [2021-06-12 19:53:35,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:35,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:35,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:35,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:35,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:35,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:35,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:35,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:35,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:35,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,889 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:35,889 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:35,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:35,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:35,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712556155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:35,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:35,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:35,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334206713] [2021-06-12 19:53:35,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:35,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:35,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:35,920 INFO L87 Difference]: Start difference. First operand 461 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:36,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:36,087 INFO L93 Difference]: Finished difference Result 629 states and 1785 transitions. [2021-06-12 19:53:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:53:36,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:36,088 INFO L225 Difference]: With dead ends: 629 [2021-06-12 19:53:36,088 INFO L226 Difference]: Without dead ends: 629 [2021-06-12 19:53:36,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-06-12 19:53:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 461. [2021-06-12 19:53:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.9065217391304348) internal successors, (1337), 460 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1337 transitions. [2021-06-12 19:53:36,093 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1337 transitions. Word has length 17 [2021-06-12 19:53:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:36,094 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1337 transitions. [2021-06-12 19:53:36,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1337 transitions. [2021-06-12 19:53:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:36,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:36,094 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:36,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1405,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:36,295 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1235007934, now seen corresponding path program 169 times [2021-06-12 19:53:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942713798] [2021-06-12 19:53:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:36,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942713798] [2021-06-12 19:53:36,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942713798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738348820] [2021-06-12 19:53:36,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:36,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:36,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:36,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:36,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:36,495 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,513 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:53:36,513 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:36,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:36,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:53:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:36,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738348820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:36,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:36,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331718671] [2021-06-12 19:53:36,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:36,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:36,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:36,536 INFO L87 Difference]: Start difference. First operand 461 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:36,926 INFO L93 Difference]: Finished difference Result 680 states and 1840 transitions. [2021-06-12 19:53:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:53:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:36,927 INFO L225 Difference]: With dead ends: 680 [2021-06-12 19:53:36,927 INFO L226 Difference]: Without dead ends: 680 [2021-06-12 19:53:36,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:53:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-12 19:53:36,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 532. [2021-06-12 19:53:36,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.9661016949152543) internal successors, (1575), 531 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:36,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1575 transitions. [2021-06-12 19:53:36,933 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1575 transitions. Word has length 17 [2021-06-12 19:53:36,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:36,933 INFO L482 AbstractCegarLoop]: Abstraction has 532 states and 1575 transitions. [2021-06-12 19:53:36,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:36,933 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1575 transitions. [2021-06-12 19:53:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:36,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:36,933 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:37,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:37,134 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:37,134 INFO L82 PathProgramCache]: Analyzing trace with hash 315307226, now seen corresponding path program 170 times [2021-06-12 19:53:37,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:37,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490831630] [2021-06-12 19:53:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:37,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:37,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490831630] [2021-06-12 19:53:37,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490831630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:37,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352216868] [2021-06-12 19:53:37,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:37,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:37,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:37,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:37,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:37,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:37,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:37,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:37,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:37,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:37,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:37,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:37,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:37,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:37,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:37,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:37,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:37,348 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:37,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:37,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:37,377 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:53:37,378 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:37,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:53:37,378 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:53:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:37,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352216868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:37,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:37,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716197699] [2021-06-12 19:53:37,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:37,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:37,409 INFO L87 Difference]: Start difference. First operand 532 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:37,842 INFO L93 Difference]: Finished difference Result 637 states and 1759 transitions. [2021-06-12 19:53:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:53:37,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:37,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:37,843 INFO L225 Difference]: With dead ends: 637 [2021-06-12 19:53:37,843 INFO L226 Difference]: Without dead ends: 633 [2021-06-12 19:53:37,843 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:53:37,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-06-12 19:53:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 534. [2021-06-12 19:53:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 2.949343339587242) internal successors, (1572), 533 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1572 transitions. [2021-06-12 19:53:37,848 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1572 transitions. Word has length 17 [2021-06-12 19:53:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:37,848 INFO L482 AbstractCegarLoop]: Abstraction has 534 states and 1572 transitions. [2021-06-12 19:53:37,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1572 transitions. [2021-06-12 19:53:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:37,849 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:37,849 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:38,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-06-12 19:53:38,050 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:38,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1242738332, now seen corresponding path program 171 times [2021-06-12 19:53:38,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:38,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070162235] [2021-06-12 19:53:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:38,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:38,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:38,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070162235] [2021-06-12 19:53:38,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070162235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:38,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83610407] [2021-06-12 19:53:38,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:38,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:53:38,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:38,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:38,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:38,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:38,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:38,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:38,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:38,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:38,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:38,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:38,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:38,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:38,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:38,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:38,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:38,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:38,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:38,244 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:38,275 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:38,275 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:38,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:38,276 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:38,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83610407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:38,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:38,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:38,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484643358] [2021-06-12 19:53:38,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:38,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:38,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:38,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:38,327 INFO L87 Difference]: Start difference. First operand 534 states and 1572 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:38,752 INFO L93 Difference]: Finished difference Result 702 states and 1885 transitions. [2021-06-12 19:53:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:53:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:38,753 INFO L225 Difference]: With dead ends: 702 [2021-06-12 19:53:38,753 INFO L226 Difference]: Without dead ends: 701 [2021-06-12 19:53:38,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 354.2ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:53:38,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-06-12 19:53:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 541. [2021-06-12 19:53:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.9611111111111112) internal successors, (1599), 540 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1599 transitions. [2021-06-12 19:53:38,759 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1599 transitions. Word has length 17 [2021-06-12 19:53:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:38,759 INFO L482 AbstractCegarLoop]: Abstraction has 541 states and 1599 transitions. [2021-06-12 19:53:38,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1599 transitions. [2021-06-12 19:53:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:38,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:38,760 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:38,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-12 19:53:38,960 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:38,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2044354560, now seen corresponding path program 172 times [2021-06-12 19:53:38,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:38,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000853279] [2021-06-12 19:53:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:39,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:39,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000853279] [2021-06-12 19:53:39,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000853279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:39,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535809296] [2021-06-12 19:53:39,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:39,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:39,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:39,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:39,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:39,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:39,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:39,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:39,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:39,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:39,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:39,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:39,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:39,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:39,185 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:39,186 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:39,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:39,186 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:39,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535809296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:39,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:39,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:39,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5485973] [2021-06-12 19:53:39,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:39,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:39,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:39,252 INFO L87 Difference]: Start difference. First operand 541 states and 1599 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:39,874 INFO L93 Difference]: Finished difference Result 712 states and 1917 transitions. [2021-06-12 19:53:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:53:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:39,875 INFO L225 Difference]: With dead ends: 712 [2021-06-12 19:53:39,876 INFO L226 Difference]: Without dead ends: 708 [2021-06-12 19:53:39,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:53:39,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-12 19:53:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 552. [2021-06-12 19:53:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.9600725952813067) internal successors, (1631), 551 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1631 transitions. [2021-06-12 19:53:39,882 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1631 transitions. Word has length 17 [2021-06-12 19:53:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:39,882 INFO L482 AbstractCegarLoop]: Abstraction has 552 states and 1631 transitions. [2021-06-12 19:53:39,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1631 transitions. [2021-06-12 19:53:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:39,883 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:39,883 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:40,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1419,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:40,083 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:40,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:40,084 INFO L82 PathProgramCache]: Analyzing trace with hash -532269030, now seen corresponding path program 173 times [2021-06-12 19:53:40,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:40,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707038445] [2021-06-12 19:53:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:40,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707038445] [2021-06-12 19:53:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707038445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:40,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519602686] [2021-06-12 19:53:40,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:40,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:53:40,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:40,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:40,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:40,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:40,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:40,286 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:40,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:40,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:40,321 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:40,321 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:40,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:40,321 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519602686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:40,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:40,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:40,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87023505] [2021-06-12 19:53:40,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:40,369 INFO L87 Difference]: Start difference. First operand 552 states and 1631 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:40,944 INFO L93 Difference]: Finished difference Result 698 states and 1886 transitions. [2021-06-12 19:53:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:53:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:40,946 INFO L225 Difference]: With dead ends: 698 [2021-06-12 19:53:40,946 INFO L226 Difference]: Without dead ends: 698 [2021-06-12 19:53:40,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:53:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2021-06-12 19:53:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 535. [2021-06-12 19:53:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.9344569288389515) internal successors, (1567), 534 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1567 transitions. [2021-06-12 19:53:40,951 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1567 transitions. Word has length 17 [2021-06-12 19:53:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:40,951 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1567 transitions. [2021-06-12 19:53:40,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1567 transitions. [2021-06-12 19:53:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:40,952 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:40,952 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:41,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1424 [2021-06-12 19:53:41,152 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1360854522, now seen corresponding path program 174 times [2021-06-12 19:53:41,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:41,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746197315] [2021-06-12 19:53:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:41,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:41,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746197315] [2021-06-12 19:53:41,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746197315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:41,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304995769] [2021-06-12 19:53:41,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:41,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:41,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:41,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:41,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:41,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:41,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:41,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:41,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:41,382 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:41,382 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:41,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:41,383 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:41,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304995769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:41,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:41,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:41,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730661053] [2021-06-12 19:53:41,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:41,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:41,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:41,449 INFO L87 Difference]: Start difference. First operand 535 states and 1567 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:42,031 INFO L93 Difference]: Finished difference Result 721 states and 1917 transitions. [2021-06-12 19:53:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 19:53:42,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:42,032 INFO L225 Difference]: With dead ends: 721 [2021-06-12 19:53:42,032 INFO L226 Difference]: Without dead ends: 716 [2021-06-12 19:53:42,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 519.7ms TimeCoverageRelationStatistics Valid=181, Invalid=1459, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:53:42,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-06-12 19:53:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 555. [2021-06-12 19:53:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 554 states have (on average 2.9422382671480145) internal successors, (1630), 554 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 1630 transitions. [2021-06-12 19:53:42,038 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 1630 transitions. Word has length 17 [2021-06-12 19:53:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:42,038 INFO L482 AbstractCegarLoop]: Abstraction has 555 states and 1630 transitions. [2021-06-12 19:53:42,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 1630 transitions. [2021-06-12 19:53:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:42,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:42,038 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:42,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1428,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:42,239 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:42,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1205065440, now seen corresponding path program 175 times [2021-06-12 19:53:42,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:42,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742974357] [2021-06-12 19:53:42,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:42,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:42,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:42,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742974357] [2021-06-12 19:53:42,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742974357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:42,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937862427] [2021-06-12 19:53:42,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:42,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:42,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:42,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:42,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:42,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:42,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:42,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:42,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:42,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:42,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:53:42,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:42,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:42,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:42,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:42,484 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:42,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:53:42,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:42,515 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:53:42,515 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:42,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:53:42,516 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:53:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:42,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937862427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:42,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:42,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:42,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307124475] [2021-06-12 19:53:42,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:42,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:42,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:42,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:42,542 INFO L87 Difference]: Start difference. First operand 555 states and 1630 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:43,039 INFO L93 Difference]: Finished difference Result 663 states and 1818 transitions. [2021-06-12 19:53:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:53:43,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:43,040 INFO L225 Difference]: With dead ends: 663 [2021-06-12 19:53:43,040 INFO L226 Difference]: Without dead ends: 655 [2021-06-12 19:53:43,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 387.1ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:53:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-12 19:53:43,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 559. [2021-06-12 19:53:43,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.921146953405018) internal successors, (1630), 558 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1630 transitions. [2021-06-12 19:53:43,046 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1630 transitions. Word has length 17 [2021-06-12 19:53:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:43,046 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1630 transitions. [2021-06-12 19:53:43,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1630 transitions. [2021-06-12 19:53:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:43,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:43,047 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:43,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1434,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:43,247 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:43,247 INFO L82 PathProgramCache]: Analyzing trace with hash 562679962, now seen corresponding path program 176 times [2021-06-12 19:53:43,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:43,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762668120] [2021-06-12 19:53:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:43,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:43,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762668120] [2021-06-12 19:53:43,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762668120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:43,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582147969] [2021-06-12 19:53:43,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:43,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:43,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:43,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:43,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:43,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:43,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:43,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:43,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:43,488 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:43,488 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:43,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:43,489 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:43,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582147969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:43,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:43,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:43,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017018094] [2021-06-12 19:53:43,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:43,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:43,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:43,509 INFO L87 Difference]: Start difference. First operand 559 states and 1630 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:43,932 INFO L93 Difference]: Finished difference Result 785 states and 2063 transitions. [2021-06-12 19:53:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:53:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:43,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:43,933 INFO L225 Difference]: With dead ends: 785 [2021-06-12 19:53:43,933 INFO L226 Difference]: Without dead ends: 785 [2021-06-12 19:53:43,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 297.9ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:53:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-06-12 19:53:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 562. [2021-06-12 19:53:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 2.9180035650623886) internal successors, (1637), 561 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1637 transitions. [2021-06-12 19:53:43,940 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1637 transitions. Word has length 17 [2021-06-12 19:53:43,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:43,940 INFO L482 AbstractCegarLoop]: Abstraction has 562 states and 1637 transitions. [2021-06-12 19:53:43,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1637 transitions. [2021-06-12 19:53:43,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:43,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:43,941 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:44,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1441 [2021-06-12 19:53:44,153 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:44,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:44,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1861027394, now seen corresponding path program 177 times [2021-06-12 19:53:44,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:44,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236178445] [2021-06-12 19:53:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:44,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:44,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:44,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236178445] [2021-06-12 19:53:44,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236178445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:44,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809705796] [2021-06-12 19:53:44,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:44,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:53:44,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:44,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:44,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:44,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:44,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:44,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:44,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:44,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:44,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:44,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:44,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:44,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:44,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:44,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:44,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:44,366 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:44,398 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:44,398 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:44,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:44,398 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:44,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809705796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:44,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:44,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:44,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111709790] [2021-06-12 19:53:44,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:44,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:44,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:44,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:44,459 INFO L87 Difference]: Start difference. First operand 562 states and 1637 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:44,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:44,873 INFO L93 Difference]: Finished difference Result 689 states and 1887 transitions. [2021-06-12 19:53:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:53:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:44,874 INFO L225 Difference]: With dead ends: 689 [2021-06-12 19:53:44,874 INFO L226 Difference]: Without dead ends: 685 [2021-06-12 19:53:44,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:53:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-12 19:53:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 571. [2021-06-12 19:53:44,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.9192982456140353) internal successors, (1664), 570 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1664 transitions. [2021-06-12 19:53:44,880 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1664 transitions. Word has length 17 [2021-06-12 19:53:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:44,880 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1664 transitions. [2021-06-12 19:53:44,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1664 transitions. [2021-06-12 19:53:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:44,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:44,881 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:45,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1444,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:45,082 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash -131980060, now seen corresponding path program 178 times [2021-06-12 19:53:45,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:45,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379235059] [2021-06-12 19:53:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:45,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:45,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379235059] [2021-06-12 19:53:45,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379235059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:45,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615902243] [2021-06-12 19:53:45,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:45,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:45,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:45,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:45,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:45,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:45,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:45,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:45,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:45,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:45,327 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:53:45,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:45,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:45,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:45,334 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:53:45,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:45,365 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:53:45,365 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:45,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:53:45,366 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:53:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:45,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615902243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:45,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:45,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:45,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959669703] [2021-06-12 19:53:45,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:45,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:45,392 INFO L87 Difference]: Start difference. First operand 571 states and 1664 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:45,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:45,654 INFO L93 Difference]: Finished difference Result 632 states and 1781 transitions. [2021-06-12 19:53:45,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:53:45,655 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:45,655 INFO L225 Difference]: With dead ends: 632 [2021-06-12 19:53:45,656 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 19:53:45,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:53:45,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 19:53:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 571. [2021-06-12 19:53:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.912280701754386) internal successors, (1660), 570 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:45,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1660 transitions. [2021-06-12 19:53:45,662 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1660 transitions. Word has length 17 [2021-06-12 19:53:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:45,662 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1660 transitions. [2021-06-12 19:53:45,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1660 transitions. [2021-06-12 19:53:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:45,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:45,662 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:45,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:45,864 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:45,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1928879742, now seen corresponding path program 179 times [2021-06-12 19:53:45,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:45,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482262832] [2021-06-12 19:53:45,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:45,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:45,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482262832] [2021-06-12 19:53:45,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482262832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:45,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122060018] [2021-06-12 19:53:45,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:45,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:45,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:45,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:45,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:46,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:46,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:46,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:46,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:53:46,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:46,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:53:46,134 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,160 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:53:46,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:46,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:53:46,162 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:53:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:46,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122060018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:46,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:46,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:46,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879823777] [2021-06-12 19:53:46,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:46,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:46,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:46,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:46,187 INFO L87 Difference]: Start difference. First operand 571 states and 1660 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:46,489 INFO L93 Difference]: Finished difference Result 628 states and 1771 transitions. [2021-06-12 19:53:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:53:46,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:46,491 INFO L225 Difference]: With dead ends: 628 [2021-06-12 19:53:46,491 INFO L226 Difference]: Without dead ends: 616 [2021-06-12 19:53:46,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:53:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-12 19:53:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 573. [2021-06-12 19:53:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.9003496503496504) internal successors, (1659), 572 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1659 transitions. [2021-06-12 19:53:46,497 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1659 transitions. Word has length 17 [2021-06-12 19:53:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:46,497 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1659 transitions. [2021-06-12 19:53:46,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1659 transitions. [2021-06-12 19:53:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:46,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:46,498 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:46,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1457 [2021-06-12 19:53:46,698 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash 146360346, now seen corresponding path program 180 times [2021-06-12 19:53:46,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:46,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348840491] [2021-06-12 19:53:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:46,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:46,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348840491] [2021-06-12 19:53:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348840491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:46,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105980180] [2021-06-12 19:53:46,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:46,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:53:46,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:46,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:46,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:46,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:46,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:46,916 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,935 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:46,935 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:46,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:46,936 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:46,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105980180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:46,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:46,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068735887] [2021-06-12 19:53:46,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:46,955 INFO L87 Difference]: Start difference. First operand 573 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:47,158 INFO L93 Difference]: Finished difference Result 666 states and 1855 transitions. [2021-06-12 19:53:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:53:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:47,159 INFO L225 Difference]: With dead ends: 666 [2021-06-12 19:53:47,159 INFO L226 Difference]: Without dead ends: 666 [2021-06-12 19:53:47,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-06-12 19:53:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 573. [2021-06-12 19:53:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.9003496503496504) internal successors, (1659), 572 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1659 transitions. [2021-06-12 19:53:47,165 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1659 transitions. Word has length 17 [2021-06-12 19:53:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:47,165 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1659 transitions. [2021-06-12 19:53:47,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1659 transitions. [2021-06-12 19:53:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:47,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:47,166 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:47,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-06-12 19:53:47,382 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:47,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:47,382 INFO L82 PathProgramCache]: Analyzing trace with hash -267672872, now seen corresponding path program 181 times [2021-06-12 19:53:47,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:47,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003607253] [2021-06-12 19:53:47,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:47,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:47,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003607253] [2021-06-12 19:53:47,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003607253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:47,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530307664] [2021-06-12 19:53:47,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:47,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:47,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:47,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:47,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:47,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:47,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:47,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:47,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:47,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:47,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:47,640 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:47,640 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:47,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:47,641 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530307664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:47,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:47,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690104994] [2021-06-12 19:53:47,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:47,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:47,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:47,690 INFO L87 Difference]: Start difference. First operand 573 states and 1659 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:47,925 INFO L93 Difference]: Finished difference Result 686 states and 1874 transitions. [2021-06-12 19:53:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:53:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:47,926 INFO L225 Difference]: With dead ends: 686 [2021-06-12 19:53:47,926 INFO L226 Difference]: Without dead ends: 686 [2021-06-12 19:53:47,926 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:53:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-12 19:53:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 583. [2021-06-12 19:53:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.90893470790378) internal successors, (1693), 582 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1693 transitions. [2021-06-12 19:53:47,932 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1693 transitions. Word has length 17 [2021-06-12 19:53:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:47,932 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1693 transitions. [2021-06-12 19:53:47,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1693 transitions. [2021-06-12 19:53:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:47,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:47,933 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:48,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1467,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:48,133 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:48,134 INFO L82 PathProgramCache]: Analyzing trace with hash 533943356, now seen corresponding path program 182 times [2021-06-12 19:53:48,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:48,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307717888] [2021-06-12 19:53:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:48,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:48,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307717888] [2021-06-12 19:53:48,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307717888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:48,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249877758] [2021-06-12 19:53:48,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:48,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:48,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:48,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:48,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:48,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:48,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:48,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:48,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:48,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:48,368 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:48,400 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:48,400 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:48,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:48,400 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:48,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249877758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:48,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:48,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:48,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351727094] [2021-06-12 19:53:48,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:48,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:48,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:48,470 INFO L87 Difference]: Start difference. First operand 583 states and 1693 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:49,213 INFO L93 Difference]: Finished difference Result 703 states and 1905 transitions. [2021-06-12 19:53:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:53:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:49,214 INFO L225 Difference]: With dead ends: 703 [2021-06-12 19:53:49,215 INFO L226 Difference]: Without dead ends: 694 [2021-06-12 19:53:49,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:53:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-12 19:53:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 588. [2021-06-12 19:53:49,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.909710391822828) internal successors, (1708), 587 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1708 transitions. [2021-06-12 19:53:49,221 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1708 transitions. Word has length 17 [2021-06-12 19:53:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:49,221 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1708 transitions. [2021-06-12 19:53:49,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1708 transitions. [2021-06-12 19:53:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:49,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:49,222 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:49,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:49,422 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2042680234, now seen corresponding path program 183 times [2021-06-12 19:53:49,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:49,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409024634] [2021-06-12 19:53:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:49,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:49,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409024634] [2021-06-12 19:53:49,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409024634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:49,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707196715] [2021-06-12 19:53:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:49,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:53:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:49,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:49,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:49,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:49,653 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:49,657 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:49,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:49,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:49,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:49,696 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:49,697 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:49,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:49,697 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:49,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707196715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:49,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:49,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:49,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822354142] [2021-06-12 19:53:49,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:49,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:49,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:49,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:49,745 INFO L87 Difference]: Start difference. First operand 588 states and 1708 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:50,241 INFO L93 Difference]: Finished difference Result 681 states and 1874 transitions. [2021-06-12 19:53:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:53:50,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:50,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:50,242 INFO L225 Difference]: With dead ends: 681 [2021-06-12 19:53:50,242 INFO L226 Difference]: Without dead ends: 681 [2021-06-12 19:53:50,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:53:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-12 19:53:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 577. [2021-06-12 19:53:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.8958333333333335) internal successors, (1668), 576 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1668 transitions. [2021-06-12 19:53:50,247 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1668 transitions. Word has length 17 [2021-06-12 19:53:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:50,248 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1668 transitions. [2021-06-12 19:53:50,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1668 transitions. [2021-06-12 19:53:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:50,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:50,248 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:50,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1476 [2021-06-12 19:53:50,450 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:50,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:50,450 INFO L82 PathProgramCache]: Analyzing trace with hash 541673754, now seen corresponding path program 184 times [2021-06-12 19:53:50,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:50,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073020990] [2021-06-12 19:53:50,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:50,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:50,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073020990] [2021-06-12 19:53:50,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073020990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951364054] [2021-06-12 19:53:50,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:50,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:50,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:50,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:50,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:50,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:50,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:50,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,726 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:50,726 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:50,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:50,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:50,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951364054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:50,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:50,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:50,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583971613] [2021-06-12 19:53:50,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:50,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:50,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:50,747 INFO L87 Difference]: Start difference. First operand 577 states and 1668 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:51,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:51,274 INFO L93 Difference]: Finished difference Result 727 states and 1960 transitions. [2021-06-12 19:53:51,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:53:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:51,276 INFO L225 Difference]: With dead ends: 727 [2021-06-12 19:53:51,276 INFO L226 Difference]: Without dead ends: 727 [2021-06-12 19:53:51,276 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 483.9ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:53:51,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-06-12 19:53:51,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 575. [2021-06-12 19:53:51,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.897212543554007) internal successors, (1663), 574 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1663 transitions. [2021-06-12 19:53:51,282 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1663 transitions. Word has length 17 [2021-06-12 19:53:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:51,282 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1663 transitions. [2021-06-12 19:53:51,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1663 transitions. [2021-06-12 19:53:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:51,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:51,283 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:51,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:51,483 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash -947731242, now seen corresponding path program 185 times [2021-06-12 19:53:51,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:51,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508776983] [2021-06-12 19:53:51,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:51,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:51,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508776983] [2021-06-12 19:53:51,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508776983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:51,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865945904] [2021-06-12 19:53:51,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:51,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:53:51,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:51,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:51,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:51,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:51,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,733 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:51,733 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:51,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:51,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:51,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865945904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:51,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:51,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:51,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674593576] [2021-06-12 19:53:51,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:51,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:51,755 INFO L87 Difference]: Start difference. First operand 575 states and 1663 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:52,215 INFO L93 Difference]: Finished difference Result 672 states and 1874 transitions. [2021-06-12 19:53:52,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:53:52,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:52,215 INFO L225 Difference]: With dead ends: 672 [2021-06-12 19:53:52,215 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 19:53:52,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:53:52,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 19:53:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 574. [2021-06-12 19:53:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.898778359511344) internal successors, (1661), 573 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1661 transitions. [2021-06-12 19:53:52,221 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1661 transitions. Word has length 17 [2021-06-12 19:53:52,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:52,221 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1661 transitions. [2021-06-12 19:53:52,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1661 transitions. [2021-06-12 19:53:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:52,222 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:52,222 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:52,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:52,423 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 125354138, now seen corresponding path program 186 times [2021-06-12 19:53:52,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:52,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639362677] [2021-06-12 19:53:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:52,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:52,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639362677] [2021-06-12 19:53:52,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639362677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094301953] [2021-06-12 19:53:52,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:52,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:52,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:52,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:52,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:52,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:52,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,672 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:53:52,672 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:52,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:52,673 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:53:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:52,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094301953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:52,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:52,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:53:52,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68958878] [2021-06-12 19:53:52,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:53:52,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:53:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:52,694 INFO L87 Difference]: Start difference. First operand 574 states and 1661 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:52,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:52,874 INFO L93 Difference]: Finished difference Result 642 states and 1808 transitions. [2021-06-12 19:53:52,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:53:52,874 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:52,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:52,875 INFO L225 Difference]: With dead ends: 642 [2021-06-12 19:53:52,875 INFO L226 Difference]: Without dead ends: 642 [2021-06-12 19:53:52,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:53:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-12 19:53:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 577. [2021-06-12 19:53:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.8975694444444446) internal successors, (1669), 576 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1669 transitions. [2021-06-12 19:53:52,881 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1669 transitions. Word has length 17 [2021-06-12 19:53:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:52,881 INFO L482 AbstractCegarLoop]: Abstraction has 577 states and 1669 transitions. [2021-06-12 19:53:52,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1669 transitions. [2021-06-12 19:53:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:52,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:52,881 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:53,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-06-12 19:53:53,082 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:53,082 INFO L82 PathProgramCache]: Analyzing trace with hash 150986938, now seen corresponding path program 187 times [2021-06-12 19:53:53,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:53,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725843435] [2021-06-12 19:53:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:53,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725843435] [2021-06-12 19:53:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725843435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241418475] [2021-06-12 19:53:53,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:53,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:53,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:53,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:53,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:53,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:53,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:53,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:53,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:53,322 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:53:53,322 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:53,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:53,323 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:53:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241418475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:53,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:53,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:53:53,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564188091] [2021-06-12 19:53:53,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:53,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:53,346 INFO L87 Difference]: Start difference. First operand 577 states and 1669 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:53,655 INFO L93 Difference]: Finished difference Result 720 states and 1941 transitions. [2021-06-12 19:53:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:53:53,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:53,656 INFO L225 Difference]: With dead ends: 720 [2021-06-12 19:53:53,656 INFO L226 Difference]: Without dead ends: 720 [2021-06-12 19:53:53,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:53:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-06-12 19:53:53,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 599. [2021-06-12 19:53:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.9180602006688963) internal successors, (1745), 598 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1745 transitions. [2021-06-12 19:53:53,662 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1745 transitions. Word has length 17 [2021-06-12 19:53:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:53,662 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1745 transitions. [2021-06-12 19:53:53,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1745 transitions. [2021-06-12 19:53:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:53,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:53,663 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:53,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1489,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:53,863 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:53,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1705036062, now seen corresponding path program 188 times [2021-06-12 19:53:53,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:53,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906420822] [2021-06-12 19:53:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:53,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:53,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906420822] [2021-06-12 19:53:53,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906420822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:53,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892232407] [2021-06-12 19:53:53,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:53,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:53:53,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:53,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:53,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:54,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:54,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:54,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:54,092 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:54,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:54,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:54,098 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:54,100 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:54,137 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:53:54,137 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:54,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:53:54,138 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:53:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:54,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892232407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:54,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:54,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:53:54,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983902763] [2021-06-12 19:53:54,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:54,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:54,170 INFO L87 Difference]: Start difference. First operand 599 states and 1745 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:54,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:54,632 INFO L93 Difference]: Finished difference Result 680 states and 1861 transitions. [2021-06-12 19:53:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:53:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:54,633 INFO L225 Difference]: With dead ends: 680 [2021-06-12 19:53:54,633 INFO L226 Difference]: Without dead ends: 674 [2021-06-12 19:53:54,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 378.9ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:53:54,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-12 19:53:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 603. [2021-06-12 19:53:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.903654485049834) internal successors, (1748), 602 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1748 transitions. [2021-06-12 19:53:54,639 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1748 transitions. Word has length 17 [2021-06-12 19:53:54,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:54,639 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1748 transitions. [2021-06-12 19:53:54,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1748 transitions. [2021-06-12 19:53:54,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:54,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:54,640 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:54,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:54,840 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash 390629276, now seen corresponding path program 189 times [2021-06-12 19:53:54,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:54,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455744251] [2021-06-12 19:53:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:54,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:54,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455744251] [2021-06-12 19:53:54,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455744251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:54,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344031307] [2021-06-12 19:53:54,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:54,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:53:54,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:54,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:55,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:55,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:55,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:55,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,085 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:53:55,085 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:55,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:53:55,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:53:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:55,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344031307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:55,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:55,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:53:55,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518053308] [2021-06-12 19:53:55,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:55,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:55,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:55,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:55,113 INFO L87 Difference]: Start difference. First operand 603 states and 1748 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:55,828 INFO L93 Difference]: Finished difference Result 783 states and 2089 transitions. [2021-06-12 19:53:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:53:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:55,830 INFO L225 Difference]: With dead ends: 783 [2021-06-12 19:53:55,830 INFO L226 Difference]: Without dead ends: 779 [2021-06-12 19:53:55,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 607.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:53:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-06-12 19:53:55,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 614. [2021-06-12 19:53:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.9200652528548123) internal successors, (1790), 613 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1790 transitions. [2021-06-12 19:53:55,836 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1790 transitions. Word has length 17 [2021-06-12 19:53:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:55,837 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1790 transitions. [2021-06-12 19:53:55,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1790 transitions. [2021-06-12 19:53:55,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:55,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:55,837 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:56,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1496 [2021-06-12 19:53:56,038 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:56,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash -529071432, now seen corresponding path program 190 times [2021-06-12 19:53:56,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:56,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539946188] [2021-06-12 19:53:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:56,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539946188] [2021-06-12 19:53:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539946188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349526912] [2021-06-12 19:53:56,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:56,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:53:56,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:56,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:56,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:56,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:56,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:56,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:56,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:56,277 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:56,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:53:56,280 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:56,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:56,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:56,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:56,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:56,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:56,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:56,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:53:56,288 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:56,315 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:53:56,315 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:56,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:53:56,315 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:53:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:56,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349526912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:56,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:56,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:53:56,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216039389] [2021-06-12 19:53:56,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:56,347 INFO L87 Difference]: Start difference. First operand 614 states and 1790 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:57,004 INFO L93 Difference]: Finished difference Result 695 states and 1916 transitions. [2021-06-12 19:53:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:53:57,004 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:57,005 INFO L225 Difference]: With dead ends: 695 [2021-06-12 19:53:57,005 INFO L226 Difference]: Without dead ends: 689 [2021-06-12 19:53:57,005 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:53:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-06-12 19:53:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 617. [2021-06-12 19:53:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.905844155844156) internal successors, (1790), 616 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1790 transitions. [2021-06-12 19:53:57,011 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1790 transitions. Word has length 17 [2021-06-12 19:53:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:57,011 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1790 transitions. [2021-06-12 19:53:57,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1790 transitions. [2021-06-12 19:53:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:57,012 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:57,012 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:57,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1498 [2021-06-12 19:53:57,212 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:57,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:57,213 INFO L82 PathProgramCache]: Analyzing trace with hash 398359674, now seen corresponding path program 191 times [2021-06-12 19:53:57,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915478296] [2021-06-12 19:53:57,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:57,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:57,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915478296] [2021-06-12 19:53:57,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915478296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880634183] [2021-06-12 19:53:57,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:57,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:53:57,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:57,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:57,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:57,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:57,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:57,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:57,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:57,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:57,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:57,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:57,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:57,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:57,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:57,463 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:57,464 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:57,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:57,464 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:57,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880634183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:57,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:57,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:53:57,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866615519] [2021-06-12 19:53:57,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:57,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:57,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:57,515 INFO L87 Difference]: Start difference. First operand 617 states and 1790 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:58,124 INFO L93 Difference]: Finished difference Result 816 states and 2117 transitions. [2021-06-12 19:53:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:53:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:58,125 INFO L225 Difference]: With dead ends: 816 [2021-06-12 19:53:58,125 INFO L226 Difference]: Without dead ends: 813 [2021-06-12 19:53:58,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:53:58,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-06-12 19:53:58,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 607. [2021-06-12 19:53:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.892739273927393) internal successors, (1753), 606 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1753 transitions. [2021-06-12 19:53:58,133 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1753 transitions. Word has length 17 [2021-06-12 19:53:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:58,133 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1753 transitions. [2021-06-12 19:53:58,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1753 transitions. [2021-06-12 19:53:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:58,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:58,133 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:58,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1503,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:58,341 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1199975902, now seen corresponding path program 192 times [2021-06-12 19:53:58,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:58,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796677211] [2021-06-12 19:53:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:58,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:58,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796677211] [2021-06-12 19:53:58,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796677211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46370771] [2021-06-12 19:53:58,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:58,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:53:58,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:53:58,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:58,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:58,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:58,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:58,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:58,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:58,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:58,598 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:58,598 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:58,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:58,598 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:58,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46370771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:58,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:58,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:53:58,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447226214] [2021-06-12 19:53:58,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:58,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:58,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:58,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:58,668 INFO L87 Difference]: Start difference. First operand 607 states and 1753 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:53:59,459 INFO L93 Difference]: Finished difference Result 758 states and 2004 transitions. [2021-06-12 19:53:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:53:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:53:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:53:59,461 INFO L225 Difference]: With dead ends: 758 [2021-06-12 19:53:59,461 INFO L226 Difference]: Without dead ends: 753 [2021-06-12 19:53:59,461 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 698.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:53:59,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-06-12 19:53:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 615. [2021-06-12 19:53:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 2.8892508143322475) internal successors, (1774), 614 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1774 transitions. [2021-06-12 19:53:59,468 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1774 transitions. Word has length 17 [2021-06-12 19:53:59,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:53:59,468 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1774 transitions. [2021-06-12 19:53:59,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:53:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1774 transitions. [2021-06-12 19:53:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:53:59,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:53:59,468 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:53:59,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1507 [2021-06-12 19:53:59,669 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:53:59,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:53:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1376647688, now seen corresponding path program 193 times [2021-06-12 19:53:59,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:53:59,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963863324] [2021-06-12 19:53:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:53:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:59,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:53:59,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963863324] [2021-06-12 19:53:59,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963863324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286488781] [2021-06-12 19:53:59,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:53:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:53:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:53:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:53:59,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:59,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:59,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:59,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:59,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:59,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:53:59,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:59,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:59,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:59,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:53:59,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:59,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:53:59,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:53:59,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:53:59,929 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:53:59,929 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:53:59,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:53:59,929 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:53:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:53:59,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286488781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:53:59,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:53:59,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:53:59,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177795428] [2021-06-12 19:53:59,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:53:59,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:53:59,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:53:59,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:53:59,978 INFO L87 Difference]: Start difference. First operand 615 states and 1774 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:00,476 INFO L93 Difference]: Finished difference Result 734 states and 1964 transitions. [2021-06-12 19:54:00,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:54:00,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:00,477 INFO L225 Difference]: With dead ends: 734 [2021-06-12 19:54:00,477 INFO L226 Difference]: Without dead ends: 734 [2021-06-12 19:54:00,477 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:54:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-06-12 19:54:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 588. [2021-06-12 19:54:00,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.8705281090289607) internal successors, (1685), 587 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1685 transitions. [2021-06-12 19:54:00,483 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1685 transitions. Word has length 17 [2021-06-12 19:54:00,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:00,483 INFO L482 AbstractCegarLoop]: Abstraction has 588 states and 1685 transitions. [2021-06-12 19:54:00,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:00,483 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1685 transitions. [2021-06-12 19:54:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:00,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:00,484 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:00,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1512 [2021-06-12 19:54:00,684 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1216001056, now seen corresponding path program 194 times [2021-06-12 19:54:00,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:00,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397898657] [2021-06-12 19:54:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:00,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:00,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397898657] [2021-06-12 19:54:00,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397898657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:00,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364215689] [2021-06-12 19:54:00,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:00,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:00,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:00,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:00,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:00,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:00,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:00,882 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:00,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:00,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:00,916 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:00,916 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:00,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:00,917 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364215689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:00,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:00,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:00,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547450052] [2021-06-12 19:54:00,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:00,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:00,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:00,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:00,980 INFO L87 Difference]: Start difference. First operand 588 states and 1685 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:01,560 INFO L93 Difference]: Finished difference Result 661 states and 1794 transitions. [2021-06-12 19:54:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:54:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:01,561 INFO L225 Difference]: With dead ends: 661 [2021-06-12 19:54:01,561 INFO L226 Difference]: Without dead ends: 657 [2021-06-12 19:54:01,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=181, Invalid=1301, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:54:01,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-06-12 19:54:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 586. [2021-06-12 19:54:01,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 2.864957264957265) internal successors, (1676), 585 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:01,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1676 transitions. [2021-06-12 19:54:01,574 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1676 transitions. Word has length 17 [2021-06-12 19:54:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:01,574 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1676 transitions. [2021-06-12 19:54:01,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1676 transitions. [2021-06-12 19:54:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:01,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:01,574 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:01,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:01,775 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:01,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:01,775 INFO L82 PathProgramCache]: Analyzing trace with hash -17959942, now seen corresponding path program 195 times [2021-06-12 19:54:01,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:01,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410827568] [2021-06-12 19:54:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:01,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410827568] [2021-06-12 19:54:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410827568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740694635] [2021-06-12 19:54:01,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:01,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:54:01,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:54:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:01,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:01,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:01,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:01,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:01,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:01,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:01,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:02,006 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:02,006 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:02,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:02,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:02,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740694635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:02,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:02,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:02,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442912467] [2021-06-12 19:54:02,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:02,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:02,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:02,055 INFO L87 Difference]: Start difference. First operand 586 states and 1676 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:02,438 INFO L93 Difference]: Finished difference Result 678 states and 1828 transitions. [2021-06-12 19:54:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:54:02,438 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:02,439 INFO L225 Difference]: With dead ends: 678 [2021-06-12 19:54:02,439 INFO L226 Difference]: Without dead ends: 676 [2021-06-12 19:54:02,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 341.9ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:54:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-06-12 19:54:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 575. [2021-06-12 19:54:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.857142857142857) internal successors, (1640), 574 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1640 transitions. [2021-06-12 19:54:02,445 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1640 transitions. Word has length 17 [2021-06-12 19:54:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:02,445 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1640 transitions. [2021-06-12 19:54:02,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:02,445 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1640 transitions. [2021-06-12 19:54:02,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:02,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:02,446 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:02,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1522 [2021-06-12 19:54:02,665 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:02,665 INFO L82 PathProgramCache]: Analyzing trace with hash 783656286, now seen corresponding path program 196 times [2021-06-12 19:54:02,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:02,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037304682] [2021-06-12 19:54:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:02,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037304682] [2021-06-12 19:54:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037304682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:02,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682884318] [2021-06-12 19:54:02,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:02,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:02,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:02,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:02,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:02,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:02,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:02,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:02,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:02,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:02,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:02,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:02,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:02,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:02,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:02,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:02,869 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:02,900 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:02,900 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:02,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:02,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:02,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682884318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:02,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:02,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:02,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789522218] [2021-06-12 19:54:02,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:02,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:02,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:02,966 INFO L87 Difference]: Start difference. First operand 575 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:03,471 INFO L93 Difference]: Finished difference Result 648 states and 1777 transitions. [2021-06-12 19:54:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:54:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:03,472 INFO L225 Difference]: With dead ends: 648 [2021-06-12 19:54:03,472 INFO L226 Difference]: Without dead ends: 642 [2021-06-12 19:54:03,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 487.9ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:54:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-12 19:54:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 583. [2021-06-12 19:54:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.852233676975945) internal successors, (1660), 582 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1660 transitions. [2021-06-12 19:54:03,478 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1660 transitions. Word has length 17 [2021-06-12 19:54:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:03,479 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1660 transitions. [2021-06-12 19:54:03,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1660 transitions. [2021-06-12 19:54:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:03,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:03,479 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:03,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1526,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:03,696 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1792967304, now seen corresponding path program 197 times [2021-06-12 19:54:03,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:03,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858451061] [2021-06-12 19:54:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:03,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:03,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858451061] [2021-06-12 19:54:03,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858451061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:03,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068558257] [2021-06-12 19:54:03,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:03,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:54:03,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:03,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:03,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:03,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:03,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:03,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:03,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:03,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:03,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:03,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:03,949 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:03,949 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:03,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:03,950 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:03,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068558257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:03,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:03,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:03,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191600672] [2021-06-12 19:54:03,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:03,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:03,996 INFO L87 Difference]: Start difference. First operand 583 states and 1660 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:04,313 INFO L93 Difference]: Finished difference Result 645 states and 1769 transitions. [2021-06-12 19:54:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:54:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:04,314 INFO L225 Difference]: With dead ends: 645 [2021-06-12 19:54:04,314 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 19:54:04,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:54:04,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 19:54:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 579. [2021-06-12 19:54:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.837370242214533) internal successors, (1640), 578 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1640 transitions. [2021-06-12 19:54:04,320 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1640 transitions. Word has length 17 [2021-06-12 19:54:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:04,320 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 1640 transitions. [2021-06-12 19:54:04,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,320 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1640 transitions. [2021-06-12 19:54:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:04,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:04,321 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:04,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1531 [2021-06-12 19:54:04,521 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:04,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 791386684, now seen corresponding path program 198 times [2021-06-12 19:54:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:04,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930686634] [2021-06-12 19:54:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:04,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930686634] [2021-06-12 19:54:04,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930686634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863469699] [2021-06-12 19:54:04,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:04,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:54:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:04,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:04,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:04,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:04,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,761 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:04,761 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:04,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:04,762 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:04,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863469699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:04,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:04,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:04,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738616416] [2021-06-12 19:54:04,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:04,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:04,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:04,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:04,781 INFO L87 Difference]: Start difference. First operand 579 states and 1640 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:04,961 INFO L93 Difference]: Finished difference Result 674 states and 1852 transitions. [2021-06-12 19:54:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:04,961 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:04,962 INFO L225 Difference]: With dead ends: 674 [2021-06-12 19:54:04,962 INFO L226 Difference]: Without dead ends: 674 [2021-06-12 19:54:04,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:54:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-06-12 19:54:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 563. [2021-06-12 19:54:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.8505338078291813) internal successors, (1602), 562 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1602 transitions. [2021-06-12 19:54:04,968 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1602 transitions. Word has length 17 [2021-06-12 19:54:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:04,968 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1602 transitions. [2021-06-12 19:54:04,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1602 transitions. [2021-06-12 19:54:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:04,969 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:04,969 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:05,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1535,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:05,171 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:05,171 INFO L82 PathProgramCache]: Analyzing trace with hash -38966150, now seen corresponding path program 199 times [2021-06-12 19:54:05,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:05,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131408056] [2021-06-12 19:54:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:05,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:05,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:05,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131408056] [2021-06-12 19:54:05,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131408056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:05,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520787271] [2021-06-12 19:54:05,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:05,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:05,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:05,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:05,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:05,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:05,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:05,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:05,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:05,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:05,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:05,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:05,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:05,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:05,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:05,410 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:05,410 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:05,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:05,411 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:05,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520787271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:05,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:05,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:05,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539710847] [2021-06-12 19:54:05,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:05,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:05,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:05,458 INFO L87 Difference]: Start difference. First operand 563 states and 1602 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:05,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:05,791 INFO L93 Difference]: Finished difference Result 696 states and 1855 transitions. [2021-06-12 19:54:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:05,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:05,793 INFO L225 Difference]: With dead ends: 696 [2021-06-12 19:54:05,793 INFO L226 Difference]: Without dead ends: 694 [2021-06-12 19:54:05,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:54:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-06-12 19:54:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 579. [2021-06-12 19:54:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.868512110726644) internal successors, (1658), 578 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:05,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1658 transitions. [2021-06-12 19:54:05,799 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1658 transitions. Word has length 17 [2021-06-12 19:54:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:05,799 INFO L482 AbstractCegarLoop]: Abstraction has 579 states and 1658 transitions. [2021-06-12 19:54:05,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:05,799 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1658 transitions. [2021-06-12 19:54:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:05,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:05,800 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:06,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1538,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:06,013 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash 762650078, now seen corresponding path program 200 times [2021-06-12 19:54:06,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:06,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114553119] [2021-06-12 19:54:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:06,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:06,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114553119] [2021-06-12 19:54:06,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114553119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:06,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220144654] [2021-06-12 19:54:06,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:06,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:06,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:06,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:06,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:06,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:06,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:06,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:06,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:06,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:06,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:06,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:06,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:06,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:06,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:06,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:06,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:06,252 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:06,253 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:06,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:06,253 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:06,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220144654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:06,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:06,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:06,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112996990] [2021-06-12 19:54:06,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:06,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:06,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:06,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:06,318 INFO L87 Difference]: Start difference. First operand 579 states and 1658 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:07,028 INFO L93 Difference]: Finished difference Result 701 states and 1857 transitions. [2021-06-12 19:54:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:54:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:07,029 INFO L225 Difference]: With dead ends: 701 [2021-06-12 19:54:07,030 INFO L226 Difference]: Without dead ends: 691 [2021-06-12 19:54:07,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:54:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-06-12 19:54:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 583. [2021-06-12 19:54:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.857388316151203) internal successors, (1663), 582 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1663 transitions. [2021-06-12 19:54:07,036 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1663 transitions. Word has length 17 [2021-06-12 19:54:07,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:07,036 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1663 transitions. [2021-06-12 19:54:07,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1663 transitions. [2021-06-12 19:54:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:07,037 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:07,037 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:07,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1542,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:07,237 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:07,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:07,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1813973512, now seen corresponding path program 201 times [2021-06-12 19:54:07,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:07,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743031363] [2021-06-12 19:54:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:07,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743031363] [2021-06-12 19:54:07,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743031363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127677990] [2021-06-12 19:54:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:54:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:07,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:07,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:07,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:07,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:07,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:07,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:07,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:07,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:07,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:07,510 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:07,510 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:07,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:07,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:07,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127677990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:07,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:07,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:07,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432737486] [2021-06-12 19:54:07,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:07,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:07,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:07,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:07,566 INFO L87 Difference]: Start difference. First operand 583 states and 1663 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:08,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:08,128 INFO L93 Difference]: Finished difference Result 688 states and 1832 transitions. [2021-06-12 19:54:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:54:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:08,130 INFO L225 Difference]: With dead ends: 688 [2021-06-12 19:54:08,130 INFO L226 Difference]: Without dead ends: 686 [2021-06-12 19:54:08,130 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:54:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-12 19:54:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 559. [2021-06-12 19:54:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.8297491039426523) internal successors, (1579), 558 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1579 transitions. [2021-06-12 19:54:08,136 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1579 transitions. Word has length 17 [2021-06-12 19:54:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:08,136 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1579 transitions. [2021-06-12 19:54:08,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1579 transitions. [2021-06-12 19:54:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:08,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:08,137 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:08,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:08,337 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash 770380476, now seen corresponding path program 202 times [2021-06-12 19:54:08,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:08,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798838520] [2021-06-12 19:54:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:08,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798838520] [2021-06-12 19:54:08,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798838520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415157180] [2021-06-12 19:54:08,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:08,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:08,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:08,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:08,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:08,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,587 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:08,587 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:08,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:08,588 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:08,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415157180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:08,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:08,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:08,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823004271] [2021-06-12 19:54:08,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:08,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:08,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:08,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:08,608 INFO L87 Difference]: Start difference. First operand 559 states and 1579 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:09,050 INFO L93 Difference]: Finished difference Result 678 states and 1798 transitions. [2021-06-12 19:54:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:54:09,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:09,051 INFO L225 Difference]: With dead ends: 678 [2021-06-12 19:54:09,051 INFO L226 Difference]: Without dead ends: 678 [2021-06-12 19:54:09,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:54:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-12 19:54:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 553. [2021-06-12 19:54:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.8206521739130435) internal successors, (1557), 552 states have internal predecessors, (1557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1557 transitions. [2021-06-12 19:54:09,056 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1557 transitions. Word has length 17 [2021-06-12 19:54:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:09,057 INFO L482 AbstractCegarLoop]: Abstraction has 553 states and 1557 transitions. [2021-06-12 19:54:09,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,057 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1557 transitions. [2021-06-12 19:54:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:09,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:09,057 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:09,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1551 [2021-06-12 19:54:09,258 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:09,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash -719024520, now seen corresponding path program 203 times [2021-06-12 19:54:09,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:09,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48742002] [2021-06-12 19:54:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:09,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:09,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48742002] [2021-06-12 19:54:09,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48742002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:09,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651025370] [2021-06-12 19:54:09,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:09,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:54:09,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:09,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:09,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:09,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:09,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:09,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,504 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:09,505 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:09,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:09,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:09,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651025370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:09,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:09,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:54:09,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736413744] [2021-06-12 19:54:09,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:09,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:09,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:09,526 INFO L87 Difference]: Start difference. First operand 553 states and 1557 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:09,796 INFO L93 Difference]: Finished difference Result 643 states and 1726 transitions. [2021-06-12 19:54:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:09,797 INFO L225 Difference]: With dead ends: 643 [2021-06-12 19:54:09,797 INFO L226 Difference]: Without dead ends: 643 [2021-06-12 19:54:09,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:09,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-06-12 19:54:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 548. [2021-06-12 19:54:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.8153564899451555) internal successors, (1540), 547 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1540 transitions. [2021-06-12 19:54:09,803 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1540 transitions. Word has length 17 [2021-06-12 19:54:09,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:09,803 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1540 transitions. [2021-06-12 19:54:09,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1540 transitions. [2021-06-12 19:54:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:09,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:09,804 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:10,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1554 [2021-06-12 19:54:10,017 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:10,017 INFO L82 PathProgramCache]: Analyzing trace with hash -690158598, now seen corresponding path program 204 times [2021-06-12 19:54:10,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:10,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399930957] [2021-06-12 19:54:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:10,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:10,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399930957] [2021-06-12 19:54:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399930957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:10,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009664357] [2021-06-12 19:54:10,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:10,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:10,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:10,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:10,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:10,266 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:10,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:10,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:10,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:10,305 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:10,305 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:10,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:10,306 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:10,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009664357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:10,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:10,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:54:10,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346998455] [2021-06-12 19:54:10,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:10,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:10,357 INFO L87 Difference]: Start difference. First operand 548 states and 1540 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:10,676 INFO L93 Difference]: Finished difference Result 690 states and 1794 transitions. [2021-06-12 19:54:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:10,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:10,678 INFO L225 Difference]: With dead ends: 690 [2021-06-12 19:54:10,678 INFO L226 Difference]: Without dead ends: 690 [2021-06-12 19:54:10,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 345.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-06-12 19:54:10,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 566. [2021-06-12 19:54:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 2.831858407079646) internal successors, (1600), 565 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 1600 transitions. [2021-06-12 19:54:10,683 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 1600 transitions. Word has length 17 [2021-06-12 19:54:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:10,684 INFO L482 AbstractCegarLoop]: Abstraction has 566 states and 1600 transitions. [2021-06-12 19:54:10,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 1600 transitions. [2021-06-12 19:54:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:10,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:10,684 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:10,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1557 [2021-06-12 19:54:10,885 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:10,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash 111457630, now seen corresponding path program 205 times [2021-06-12 19:54:10,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:10,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648415031] [2021-06-12 19:54:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:10,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:10,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648415031] [2021-06-12 19:54:10,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648415031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:10,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264201463] [2021-06-12 19:54:10,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:11,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:11,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:11,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:11,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:11,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:11,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:11,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:11,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:11,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:11,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:11,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:11,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:11,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:11,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:11,124 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:11,155 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:11,155 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:11,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:11,156 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:11,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:11,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264201463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:11,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:11,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:54:11,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689773877] [2021-06-12 19:54:11,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:11,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:11,225 INFO L87 Difference]: Start difference. First operand 566 states and 1600 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:12,135 INFO L93 Difference]: Finished difference Result 716 states and 1856 transitions. [2021-06-12 19:54:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:54:12,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:12,136 INFO L225 Difference]: With dead ends: 716 [2021-06-12 19:54:12,136 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 19:54:12,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 821.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:54:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 19:54:12,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 578. [2021-06-12 19:54:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 2.8405545927209706) internal successors, (1639), 577 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1639 transitions. [2021-06-12 19:54:12,143 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1639 transitions. Word has length 17 [2021-06-12 19:54:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:12,143 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1639 transitions. [2021-06-12 19:54:12,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:12,143 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1639 transitions. [2021-06-12 19:54:12,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:12,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:12,143 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:12,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1561 [2021-06-12 19:54:12,344 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:12,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1829801336, now seen corresponding path program 206 times [2021-06-12 19:54:12,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:12,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630188582] [2021-06-12 19:54:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:12,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:12,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630188582] [2021-06-12 19:54:12,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630188582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:12,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746480134] [2021-06-12 19:54:12,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:12,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:12,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:12,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:12,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:12,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:12,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:12,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:12,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:12,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:12,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:12,617 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:12,617 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:12,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:12,618 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:12,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746480134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:12,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:12,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:54:12,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656216371] [2021-06-12 19:54:12,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:12,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:12,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:12,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:12,665 INFO L87 Difference]: Start difference. First operand 578 states and 1639 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:13,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:13,094 INFO L93 Difference]: Finished difference Result 672 states and 1791 transitions. [2021-06-12 19:54:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:54:13,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:13,095 INFO L225 Difference]: With dead ends: 672 [2021-06-12 19:54:13,095 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 19:54:13,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:54:13,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 19:54:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 574. [2021-06-12 19:54:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-06-12 19:54:13,101 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-06-12 19:54:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:13,101 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-06-12 19:54:13,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-06-12 19:54:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:13,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:13,102 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:13,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1566,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:13,302 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:13,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:13,302 INFO L82 PathProgramCache]: Analyzing trace with hash 119188028, now seen corresponding path program 207 times [2021-06-12 19:54:13,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:13,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026966147] [2021-06-12 19:54:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:13,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026966147] [2021-06-12 19:54:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026966147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708561387] [2021-06-12 19:54:13,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:13,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:13,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:13,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:13,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:13,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:13,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:13,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:13,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:13,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:13,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:13,590 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:13,590 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:13,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:13,591 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:13,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708561387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:13,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:13,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:54:13,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134411833] [2021-06-12 19:54:13,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:13,612 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:14,297 INFO L93 Difference]: Finished difference Result 736 states and 1924 transitions. [2021-06-12 19:54:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:54:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:14,298 INFO L225 Difference]: With dead ends: 736 [2021-06-12 19:54:14,298 INFO L226 Difference]: Without dead ends: 736 [2021-06-12 19:54:14,298 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:54:14,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-06-12 19:54:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 584. [2021-06-12 19:54:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 2.8456260720411666) internal successors, (1659), 583 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1659 transitions. [2021-06-12 19:54:14,305 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1659 transitions. Word has length 17 [2021-06-12 19:54:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:14,305 INFO L482 AbstractCegarLoop]: Abstraction has 584 states and 1659 transitions. [2021-06-12 19:54:14,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1659 transitions. [2021-06-12 19:54:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:14,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:14,306 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1570,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:14,518 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1370216968, now seen corresponding path program 208 times [2021-06-12 19:54:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:14,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361397824] [2021-06-12 19:54:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:14,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361397824] [2021-06-12 19:54:14,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361397824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:14,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236087504] [2021-06-12 19:54:14,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:14,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:14,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:14,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:14,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:14,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:14,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:14,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,789 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:14,789 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:14,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:14,790 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:14,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236087504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:14,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:14,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:54:14,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802027778] [2021-06-12 19:54:14,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:14,815 INFO L87 Difference]: Start difference. First operand 584 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:15,812 INFO L93 Difference]: Finished difference Result 734 states and 1938 transitions. [2021-06-12 19:54:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 19:54:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:15,813 INFO L225 Difference]: With dead ends: 734 [2021-06-12 19:54:15,813 INFO L226 Difference]: Without dead ends: 734 [2021-06-12 19:54:15,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 835.1ms TimeCoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:54:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-06-12 19:54:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 574. [2021-06-12 19:54:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-06-12 19:54:15,819 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-06-12 19:54:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:15,819 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-06-12 19:54:15,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-06-12 19:54:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:15,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:15,820 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:16,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1573,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:16,020 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:16,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:16,021 INFO L82 PathProgramCache]: Analyzing trace with hash -297131588, now seen corresponding path program 209 times [2021-06-12 19:54:16,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:16,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456517877] [2021-06-12 19:54:16,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:16,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456517877] [2021-06-12 19:54:16,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456517877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590134687] [2021-06-12 19:54:16,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:16,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:54:16,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:16,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:16,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:16,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:16,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:16,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:16,393 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:16,394 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:16,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:16,394 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590134687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:16,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:54:16,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792840267] [2021-06-12 19:54:16,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:16,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:16,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:16,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:16,420 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:16,629 INFO L93 Difference]: Finished difference Result 624 states and 1716 transitions. [2021-06-12 19:54:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:16,629 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:16,630 INFO L225 Difference]: With dead ends: 624 [2021-06-12 19:54:16,630 INFO L226 Difference]: Without dead ends: 624 [2021-06-12 19:54:16,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:16,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-06-12 19:54:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 574. [2021-06-12 19:54:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.832460732984293) internal successors, (1623), 573 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1623 transitions. [2021-06-12 19:54:16,635 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1623 transitions. Word has length 17 [2021-06-12 19:54:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:16,635 INFO L482 AbstractCegarLoop]: Abstraction has 574 states and 1623 transitions. [2021-06-12 19:54:16,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1623 transitions. [2021-06-12 19:54:16,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:16,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:16,636 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:16,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1576 [2021-06-12 19:54:16,852 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash 906074430, now seen corresponding path program 210 times [2021-06-12 19:54:16,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:16,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172245562] [2021-06-12 19:54:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:16,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:16,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172245562] [2021-06-12 19:54:16,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172245562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780667013] [2021-06-12 19:54:16,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:17,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:17,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:17,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:17,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:17,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:17,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,229 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:54:17,229 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:17,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,230 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:54:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:17,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780667013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:17,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:17,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:17,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311915788] [2021-06-12 19:54:17,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:17,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:17,254 INFO L87 Difference]: Start difference. First operand 574 states and 1623 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:17,508 INFO L93 Difference]: Finished difference Result 706 states and 1888 transitions. [2021-06-12 19:54:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:17,509 INFO L225 Difference]: With dead ends: 706 [2021-06-12 19:54:17,509 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 19:54:17,509 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:17,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 19:54:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 613. [2021-06-12 19:54:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 2.8643790849673203) internal successors, (1753), 612 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1753 transitions. [2021-06-12 19:54:17,515 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1753 transitions. Word has length 17 [2021-06-12 19:54:17,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:17,515 INFO L482 AbstractCegarLoop]: Abstraction has 613 states and 1753 transitions. [2021-06-12 19:54:17,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:17,515 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1753 transitions. [2021-06-12 19:54:17,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:17,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:17,516 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:17,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:17,729 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:17,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:17,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1836957018, now seen corresponding path program 211 times [2021-06-12 19:54:17,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:17,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916271541] [2021-06-12 19:54:17,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:17,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:17,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916271541] [2021-06-12 19:54:17,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916271541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:17,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273422449] [2021-06-12 19:54:17,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:17,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:17,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:17,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:17,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:17,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:17,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:17,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:17,983 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:17,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:17,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:18,011 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:54:18,012 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:18,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:18,012 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:54:18,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:18,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273422449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:18,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:18,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:18,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638301315] [2021-06-12 19:54:18,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:18,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:18,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:18,045 INFO L87 Difference]: Start difference. First operand 613 states and 1753 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:18,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:18,436 INFO L93 Difference]: Finished difference Result 692 states and 1851 transitions. [2021-06-12 19:54:18,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:54:18,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:18,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:18,437 INFO L225 Difference]: With dead ends: 692 [2021-06-12 19:54:18,437 INFO L226 Difference]: Without dead ends: 684 [2021-06-12 19:54:18,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:54:18,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-06-12 19:54:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 619. [2021-06-12 19:54:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.8462783171521036) internal successors, (1759), 618 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:18,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1759 transitions. [2021-06-12 19:54:18,444 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1759 transitions. Word has length 17 [2021-06-12 19:54:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:18,444 INFO L482 AbstractCegarLoop]: Abstraction has 619 states and 1759 transitions. [2021-06-12 19:54:18,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1759 transitions. [2021-06-12 19:54:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:18,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:18,445 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:18,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1581,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:18,645 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:18,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:18,645 INFO L82 PathProgramCache]: Analyzing trace with hash -254947684, now seen corresponding path program 212 times [2021-06-12 19:54:18,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:18,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294186964] [2021-06-12 19:54:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:18,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294186964] [2021-06-12 19:54:18,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294186964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:18,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974889391] [2021-06-12 19:54:18,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:18,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:18,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:18,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:18,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:18,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:18,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:18,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:18,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:18,910 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:54:18,910 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:18,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:18,911 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:54:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:18,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974889391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:18,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:18,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:18,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776390983] [2021-06-12 19:54:18,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:18,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:18,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:18,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:18,934 INFO L87 Difference]: Start difference. First operand 619 states and 1759 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:19,898 INFO L93 Difference]: Finished difference Result 784 states and 2026 transitions. [2021-06-12 19:54:19,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 19:54:19,898 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:19,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:19,899 INFO L225 Difference]: With dead ends: 784 [2021-06-12 19:54:19,899 INFO L226 Difference]: Without dead ends: 780 [2021-06-12 19:54:19,899 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 820.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1814, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 19:54:19,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-06-12 19:54:19,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 614. [2021-06-12 19:54:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 2.858075040783034) internal successors, (1752), 613 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1752 transitions. [2021-06-12 19:54:19,906 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1752 transitions. Word has length 17 [2021-06-12 19:54:19,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:19,906 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1752 transitions. [2021-06-12 19:54:19,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1752 transitions. [2021-06-12 19:54:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:19,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:19,907 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:20,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1586 [2021-06-12 19:54:20,121 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:20,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1299101440, now seen corresponding path program 213 times [2021-06-12 19:54:20,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:20,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823480143] [2021-06-12 19:54:20,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:20,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:20,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823480143] [2021-06-12 19:54:20,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823480143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:20,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948861511] [2021-06-12 19:54:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:20,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:20,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:20,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:20,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:20,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:20,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:20,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,411 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:20,411 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:20,438 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:54:20,438 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:20,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:20,439 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:54:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:20,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948861511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:20,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:20,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:20,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113300433] [2021-06-12 19:54:20,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:20,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:20,472 INFO L87 Difference]: Start difference. First operand 614 states and 1752 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:21,032 INFO L93 Difference]: Finished difference Result 701 states and 1867 transitions. [2021-06-12 19:54:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:54:21,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:21,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:21,033 INFO L225 Difference]: With dead ends: 701 [2021-06-12 19:54:21,033 INFO L226 Difference]: Without dead ends: 695 [2021-06-12 19:54:21,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1240, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:54:21,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-06-12 19:54:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 617. [2021-06-12 19:54:21,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.8490259740259742) internal successors, (1755), 616 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1755 transitions. [2021-06-12 19:54:21,040 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1755 transitions. Word has length 17 [2021-06-12 19:54:21,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:21,040 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1755 transitions. [2021-06-12 19:54:21,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:21,040 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1755 transitions. [2021-06-12 19:54:21,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:21,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:21,041 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:21,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1588,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:21,257 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:21,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:21,257 INFO L82 PathProgramCache]: Analyzing trace with hash -15305346, now seen corresponding path program 214 times [2021-06-12 19:54:21,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:21,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308791626] [2021-06-12 19:54:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:21,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308791626] [2021-06-12 19:54:21,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308791626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159526411] [2021-06-12 19:54:21,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:21,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:21,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:21,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:21,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:21,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:21,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:21,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:21,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:21,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:21,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:21,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:21,559 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:54:21,559 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:21,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:21,560 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:54:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:21,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159526411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:21,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:21,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:21,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104068825] [2021-06-12 19:54:21,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:21,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:21,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:21,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:21,583 INFO L87 Difference]: Start difference. First operand 617 states and 1755 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:22,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:22,404 INFO L93 Difference]: Finished difference Result 784 states and 2032 transitions. [2021-06-12 19:54:22,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:54:22,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:22,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:22,405 INFO L225 Difference]: With dead ends: 784 [2021-06-12 19:54:22,405 INFO L226 Difference]: Without dead ends: 779 [2021-06-12 19:54:22,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:54:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-06-12 19:54:22,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 621. [2021-06-12 19:54:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.861290322580645) internal successors, (1774), 620 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:22,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1774 transitions. [2021-06-12 19:54:22,412 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1774 transitions. Word has length 17 [2021-06-12 19:54:22,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:22,412 INFO L482 AbstractCegarLoop]: Abstraction has 621 states and 1774 transitions. [2021-06-12 19:54:22,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:22,412 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1774 transitions. [2021-06-12 19:54:22,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:22,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:22,413 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:22,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:22,613 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash -935006054, now seen corresponding path program 215 times [2021-06-12 19:54:22,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:22,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355008552] [2021-06-12 19:54:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:22,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355008552] [2021-06-12 19:54:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355008552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013006206] [2021-06-12 19:54:22,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:22,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:22,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:22,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:22,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:22,893 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:22,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:22,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:22,899 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:22,901 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:22,903 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:22,931 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:54:22,931 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:22,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:22,932 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:54:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:22,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013006206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:22,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:22,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:22,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733503451] [2021-06-12 19:54:22,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:22,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:22,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:22,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:22,962 INFO L87 Difference]: Start difference. First operand 621 states and 1774 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:23,580 INFO L93 Difference]: Finished difference Result 681 states and 1857 transitions. [2021-06-12 19:54:23,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:54:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:23,581 INFO L225 Difference]: With dead ends: 681 [2021-06-12 19:54:23,581 INFO L226 Difference]: Without dead ends: 677 [2021-06-12 19:54:23,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 560.3ms TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:54:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-06-12 19:54:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 622. [2021-06-12 19:54:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.848631239935588) internal successors, (1769), 621 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:23,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1769 transitions. [2021-06-12 19:54:23,587 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1769 transitions. Word has length 17 [2021-06-12 19:54:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:23,587 INFO L482 AbstractCegarLoop]: Abstraction has 622 states and 1769 transitions. [2021-06-12 19:54:23,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1769 transitions. [2021-06-12 19:54:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:23,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:23,588 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:23,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1595 [2021-06-12 19:54:23,788 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash -7574948, now seen corresponding path program 216 times [2021-06-12 19:54:23,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:23,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498303117] [2021-06-12 19:54:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:23,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498303117] [2021-06-12 19:54:23,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498303117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028750149] [2021-06-12 19:54:23,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:23,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:23,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:24,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:24,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:24,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:24,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:24,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:24,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:24,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:24,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:24,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:24,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:24,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:24,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:24,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:24,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:24,090 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:24,090 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:24,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:24,091 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:24,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028750149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:24,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:24,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:24,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284198118] [2021-06-12 19:54:24,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:24,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:24,143 INFO L87 Difference]: Start difference. First operand 622 states and 1769 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:24,716 INFO L93 Difference]: Finished difference Result 783 states and 1990 transitions. [2021-06-12 19:54:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:54:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:24,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:24,717 INFO L225 Difference]: With dead ends: 783 [2021-06-12 19:54:24,717 INFO L226 Difference]: Without dead ends: 781 [2021-06-12 19:54:24,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 528.6ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:54:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2021-06-12 19:54:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 603. [2021-06-12 19:54:24,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.835548172757475) internal successors, (1707), 602 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1707 transitions. [2021-06-12 19:54:24,724 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1707 transitions. Word has length 17 [2021-06-12 19:54:24,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:24,724 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1707 transitions. [2021-06-12 19:54:24,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1707 transitions. [2021-06-12 19:54:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:24,725 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:24,725 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:24,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1600,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:24,925 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 794041280, now seen corresponding path program 217 times [2021-06-12 19:54:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:24,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658270292] [2021-06-12 19:54:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:25,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:25,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658270292] [2021-06-12 19:54:25,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658270292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:25,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838694983] [2021-06-12 19:54:25,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:25,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:25,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:25,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:25,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:25,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:25,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:25,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:25,228 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:25,259 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:25,260 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:25,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:25,260 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:25,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838694983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:25,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:25,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:25,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847742977] [2021-06-12 19:54:25,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:25,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:25,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:25,329 INFO L87 Difference]: Start difference. First operand 603 states and 1707 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:25,874 INFO L93 Difference]: Finished difference Result 687 states and 1842 transitions. [2021-06-12 19:54:25,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:54:25,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:25,875 INFO L225 Difference]: With dead ends: 687 [2021-06-12 19:54:25,875 INFO L226 Difference]: Without dead ends: 683 [2021-06-12 19:54:25,875 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 587.1ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:54:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-12 19:54:25,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 607. [2021-06-12 19:54:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 2.8333333333333335) internal successors, (1717), 606 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:25,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1717 transitions. [2021-06-12 19:54:25,881 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1717 transitions. Word has length 17 [2021-06-12 19:54:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:25,881 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1717 transitions. [2021-06-12 19:54:25,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1717 transitions. [2021-06-12 19:54:25,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:25,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:25,882 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:26,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1604 [2021-06-12 19:54:26,082 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1782582310, now seen corresponding path program 218 times [2021-06-12 19:54:26,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:26,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199115961] [2021-06-12 19:54:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:26,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:26,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:26,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199115961] [2021-06-12 19:54:26,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199115961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:26,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547149676] [2021-06-12 19:54:26,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:26,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:26,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:26,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:26,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:26,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:26,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:26,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:26,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:26,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:26,371 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:26,371 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:26,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:26,372 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:26,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547149676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:26,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:26,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:26,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938156839] [2021-06-12 19:54:26,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:26,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:26,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:26,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:26,423 INFO L87 Difference]: Start difference. First operand 607 states and 1717 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:26,775 INFO L93 Difference]: Finished difference Result 678 states and 1827 transitions. [2021-06-12 19:54:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:26,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:26,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:26,777 INFO L225 Difference]: With dead ends: 678 [2021-06-12 19:54:26,777 INFO L226 Difference]: Without dead ends: 678 [2021-06-12 19:54:26,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:54:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-06-12 19:54:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 592. [2021-06-12 19:54:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 2.83248730964467) internal successors, (1674), 591 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1674 transitions. [2021-06-12 19:54:26,783 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1674 transitions. Word has length 17 [2021-06-12 19:54:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:26,783 INFO L482 AbstractCegarLoop]: Abstraction has 592 states and 1674 transitions. [2021-06-12 19:54:26,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1674 transitions. [2021-06-12 19:54:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:26,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:26,783 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:26,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1609,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:26,984 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:26,984 INFO L82 PathProgramCache]: Analyzing trace with hash 505854650, now seen corresponding path program 219 times [2021-06-12 19:54:26,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:26,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535661900] [2021-06-12 19:54:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:27,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:27,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535661900] [2021-06-12 19:54:27,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535661900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:27,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065290689] [2021-06-12 19:54:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:27,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:54:27,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:27,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:27,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:27,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:27,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:27,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:27,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:27,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:27,237 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:27,237 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:27,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:27,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:27,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065290689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:27,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:27,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277960190] [2021-06-12 19:54:27,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:27,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:27,301 INFO L87 Difference]: Start difference. First operand 592 states and 1674 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:27,830 INFO L93 Difference]: Finished difference Result 624 states and 1727 transitions. [2021-06-12 19:54:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:54:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:27,832 INFO L225 Difference]: With dead ends: 624 [2021-06-12 19:54:27,832 INFO L226 Difference]: Without dead ends: 620 [2021-06-12 19:54:27,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 550.9ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:54:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-12 19:54:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 594. [2021-06-12 19:54:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.8279932546374367) internal successors, (1677), 593 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1677 transitions. [2021-06-12 19:54:27,837 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1677 transitions. Word has length 17 [2021-06-12 19:54:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:27,838 INFO L482 AbstractCegarLoop]: Abstraction has 594 states and 1677 transitions. [2021-06-12 19:54:27,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1677 transitions. [2021-06-12 19:54:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:27,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:27,838 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:28,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1613 [2021-06-12 19:54:28,039 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:28,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1517986152, now seen corresponding path program 220 times [2021-06-12 19:54:28,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:28,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672377486] [2021-06-12 19:54:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:28,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:28,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672377486] [2021-06-12 19:54:28,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672377486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:28,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257714612] [2021-06-12 19:54:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:28,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:28,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:28,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:28,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:28,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:28,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:28,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:28,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:28,245 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:28,277 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:28,277 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:28,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:28,278 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:28,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257714612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:28,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:28,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:54:28,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800675020] [2021-06-12 19:54:28,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:28,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:28,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:28,326 INFO L87 Difference]: Start difference. First operand 594 states and 1677 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:28,653 INFO L93 Difference]: Finished difference Result 722 states and 1901 transitions. [2021-06-12 19:54:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:28,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:28,654 INFO L225 Difference]: With dead ends: 722 [2021-06-12 19:54:28,654 INFO L226 Difference]: Without dead ends: 722 [2021-06-12 19:54:28,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:54:28,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-06-12 19:54:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 606. [2021-06-12 19:54:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.8413223140495867) internal successors, (1719), 605 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1719 transitions. [2021-06-12 19:54:28,661 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1719 transitions. Word has length 17 [2021-06-12 19:54:28,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:28,661 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1719 transitions. [2021-06-12 19:54:28,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:28,661 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1719 transitions. [2021-06-12 19:54:28,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:28,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:28,662 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:28,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1619,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:28,862 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash -716369924, now seen corresponding path program 221 times [2021-06-12 19:54:28,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:28,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935706903] [2021-06-12 19:54:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:28,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935706903] [2021-06-12 19:54:28,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935706903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:28,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923185857] [2021-06-12 19:54:28,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:28,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:54:28,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:28,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:29,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:29,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:29,071 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:29,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:29,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:29,074 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:29,107 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:29,107 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:29,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:29,108 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:29,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923185857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:29,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:29,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:54:29,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835973514] [2021-06-12 19:54:29,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:29,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:29,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:29,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:29,177 INFO L87 Difference]: Start difference. First operand 606 states and 1719 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:29,722 INFO L93 Difference]: Finished difference Result 766 states and 2029 transitions. [2021-06-12 19:54:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:54:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:29,723 INFO L225 Difference]: With dead ends: 766 [2021-06-12 19:54:29,723 INFO L226 Difference]: Without dead ends: 760 [2021-06-12 19:54:29,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:54:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-12 19:54:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 655. [2021-06-12 19:54:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 2.853211009174312) internal successors, (1866), 654 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 1866 transitions. [2021-06-12 19:54:29,731 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 1866 transitions. Word has length 17 [2021-06-12 19:54:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:29,731 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 1866 transitions. [2021-06-12 19:54:29,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 1866 transitions. [2021-06-12 19:54:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:29,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:29,731 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:29,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1623 [2021-06-12 19:54:29,932 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:29,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:29,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1001973782, now seen corresponding path program 222 times [2021-06-12 19:54:29,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:29,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780256255] [2021-06-12 19:54:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:30,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:30,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780256255] [2021-06-12 19:54:30,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780256255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:30,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999579777] [2021-06-12 19:54:30,012 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:30,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:30,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:30,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:30,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:30,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:30,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:30,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:30,167 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,198 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:30,198 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:30,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:30,199 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999579777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:30,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:30,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:54:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970909891] [2021-06-12 19:54:30,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:30,245 INFO L87 Difference]: Start difference. First operand 655 states and 1866 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:30,520 INFO L93 Difference]: Finished difference Result 739 states and 1992 transitions. [2021-06-12 19:54:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:30,521 INFO L225 Difference]: With dead ends: 739 [2021-06-12 19:54:30,521 INFO L226 Difference]: Without dead ends: 739 [2021-06-12 19:54:30,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-12 19:54:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 649. [2021-06-12 19:54:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.8410493827160495) internal successors, (1841), 648 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1841 transitions. [2021-06-12 19:54:30,528 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1841 transitions. Word has length 17 [2021-06-12 19:54:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:30,528 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1841 transitions. [2021-06-12 19:54:30,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1841 transitions. [2021-06-12 19:54:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:30,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:30,528 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:30,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1628,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:30,729 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash -708639526, now seen corresponding path program 223 times [2021-06-12 19:54:30,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:30,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732049735] [2021-06-12 19:54:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:30,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:30,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732049735] [2021-06-12 19:54:30,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732049735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:30,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804142065] [2021-06-12 19:54:30,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:30,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:30,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:30,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:30,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:30,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,966 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:30,966 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:30,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:30,967 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804142065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:30,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:30,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:54:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136927840] [2021-06-12 19:54:30,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:30,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:30,987 INFO L87 Difference]: Start difference. First operand 649 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:31,187 INFO L93 Difference]: Finished difference Result 760 states and 2046 transitions. [2021-06-12 19:54:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:31,188 INFO L225 Difference]: With dead ends: 760 [2021-06-12 19:54:31,189 INFO L226 Difference]: Without dead ends: 760 [2021-06-12 19:54:31,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:31,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-06-12 19:54:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 649. [2021-06-12 19:54:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.8410493827160495) internal successors, (1841), 648 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1841 transitions. [2021-06-12 19:54:31,195 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1841 transitions. Word has length 17 [2021-06-12 19:54:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:31,195 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1841 transitions. [2021-06-12 19:54:31,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1841 transitions. [2021-06-12 19:54:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:31,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:31,196 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:31,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1632,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:31,412 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:31,412 INFO L82 PathProgramCache]: Analyzing trace with hash -561657414, now seen corresponding path program 224 times [2021-06-12 19:54:31,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:31,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057965081] [2021-06-12 19:54:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:31,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:31,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057965081] [2021-06-12 19:54:31,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057965081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:31,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184996135] [2021-06-12 19:54:31,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:31,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:31,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:31,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:31,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:31,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:31,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:31,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:31,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:31,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:31,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:31,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:31,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:31,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:31,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:31,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:31,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:31,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:31,653 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:31,654 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:31,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:31,657 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:31,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184996135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:31,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:31,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:54:31,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065383125] [2021-06-12 19:54:31,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:31,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:31,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:31,717 INFO L87 Difference]: Start difference. First operand 649 states and 1841 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:32,083 INFO L93 Difference]: Finished difference Result 689 states and 1903 transitions. [2021-06-12 19:54:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:54:32,084 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:32,085 INFO L225 Difference]: With dead ends: 689 [2021-06-12 19:54:32,085 INFO L226 Difference]: Without dead ends: 685 [2021-06-12 19:54:32,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:54:32,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-12 19:54:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 647. [2021-06-12 19:54:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.8390092879256965) internal successors, (1834), 646 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1834 transitions. [2021-06-12 19:54:32,091 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1834 transitions. Word has length 17 [2021-06-12 19:54:32,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:32,091 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1834 transitions. [2021-06-12 19:54:32,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:32,091 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1834 transitions. [2021-06-12 19:54:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:32,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:32,092 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:32,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1635 [2021-06-12 19:54:32,292 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:32,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1167389920, now seen corresponding path program 225 times [2021-06-12 19:54:32,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:32,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466295359] [2021-06-12 19:54:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:32,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:32,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466295359] [2021-06-12 19:54:32,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466295359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:32,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318782144] [2021-06-12 19:54:32,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:32,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:32,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:32,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:32,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:32,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:32,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:32,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:32,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:32,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:32,533 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:32,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:32,564 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:54:32,564 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:32,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:32,565 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:54:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:32,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318782144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:32,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:32,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:54:32,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959190418] [2021-06-12 19:54:32,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:32,591 INFO L87 Difference]: Start difference. First operand 647 states and 1834 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:32,809 INFO L93 Difference]: Finished difference Result 662 states and 1857 transitions. [2021-06-12 19:54:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:32,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:32,810 INFO L225 Difference]: With dead ends: 662 [2021-06-12 19:54:32,811 INFO L226 Difference]: Without dead ends: 654 [2021-06-12 19:54:32,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:32,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-06-12 19:54:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 645. [2021-06-12 19:54:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 2.8338509316770186) internal successors, (1825), 644 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1825 transitions. [2021-06-12 19:54:32,817 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1825 transitions. Word has length 17 [2021-06-12 19:54:32,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:32,817 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 1825 transitions. [2021-06-12 19:54:32,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:32,817 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1825 transitions. [2021-06-12 19:54:32,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:32,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:32,817 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:33,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1641 [2021-06-12 19:54:33,018 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1096093220, now seen corresponding path program 226 times [2021-06-12 19:54:33,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:33,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702419142] [2021-06-12 19:54:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:33,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:33,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702419142] [2021-06-12 19:54:33,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702419142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:33,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49761740] [2021-06-12 19:54:33,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:33,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:33,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:33,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:33,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:33,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:33,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:33,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:33,256 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:33,287 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:33,288 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:33,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:33,288 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:33,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49761740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:33,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:33,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:33,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555726670] [2021-06-12 19:54:33,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:33,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:33,342 INFO L87 Difference]: Start difference. First operand 645 states and 1825 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:33,746 INFO L93 Difference]: Finished difference Result 828 states and 2196 transitions. [2021-06-12 19:54:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:33,747 INFO L225 Difference]: With dead ends: 828 [2021-06-12 19:54:33,747 INFO L226 Difference]: Without dead ends: 827 [2021-06-12 19:54:33,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:54:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-12 19:54:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 694. [2021-06-12 19:54:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.8715728715728717) internal successors, (1990), 693 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:33,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1990 transitions. [2021-06-12 19:54:33,754 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1990 transitions. Word has length 17 [2021-06-12 19:54:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:33,754 INFO L482 AbstractCegarLoop]: Abstraction has 694 states and 1990 transitions. [2021-06-12 19:54:33,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1990 transitions. [2021-06-12 19:54:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:33,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:33,755 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:33,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1648 [2021-06-12 19:54:33,956 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:33,956 INFO L82 PathProgramCache]: Analyzing trace with hash -294476992, now seen corresponding path program 227 times [2021-06-12 19:54:33,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:33,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237807878] [2021-06-12 19:54:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:34,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237807878] [2021-06-12 19:54:34,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237807878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:34,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177445122] [2021-06-12 19:54:34,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:34,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:34,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:34,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:34,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:34,176 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:34,180 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:34,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:34,183 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:34,214 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:34,215 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:34,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:34,215 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:34,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177445122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:34,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:34,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263683789] [2021-06-12 19:54:34,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:34,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:34,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:34,282 INFO L87 Difference]: Start difference. First operand 694 states and 1990 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:34,884 INFO L93 Difference]: Finished difference Result 821 states and 2194 transitions. [2021-06-12 19:54:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:54:34,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:34,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:34,885 INFO L225 Difference]: With dead ends: 821 [2021-06-12 19:54:34,885 INFO L226 Difference]: Without dead ends: 813 [2021-06-12 19:54:34,885 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:54:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-06-12 19:54:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 705. [2021-06-12 19:54:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 2.875) internal successors, (2024), 704 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:34,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2024 transitions. [2021-06-12 19:54:34,892 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2024 transitions. Word has length 17 [2021-06-12 19:54:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:34,892 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2024 transitions. [2021-06-12 19:54:34,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2024 transitions. [2021-06-12 19:54:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:34,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:34,893 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:35,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1652 [2021-06-12 19:54:35,094 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:35,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1423866714, now seen corresponding path program 228 times [2021-06-12 19:54:35,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:35,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431713458] [2021-06-12 19:54:35,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:35,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:35,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431713458] [2021-06-12 19:54:35,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431713458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:35,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568077350] [2021-06-12 19:54:35,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:35,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:35,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:35,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:35,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:35,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:35,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:35,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:35,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:35,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:35,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:35,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:35,349 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:35,349 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:35,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:35,349 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:35,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568077350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:35,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:35,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:35,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477540987] [2021-06-12 19:54:35,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:35,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:35,400 INFO L87 Difference]: Start difference. First operand 705 states and 2024 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:35,768 INFO L93 Difference]: Finished difference Result 803 states and 2170 transitions. [2021-06-12 19:54:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:54:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:35,769 INFO L225 Difference]: With dead ends: 803 [2021-06-12 19:54:35,769 INFO L226 Difference]: Without dead ends: 803 [2021-06-12 19:54:35,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:54:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-06-12 19:54:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 697. [2021-06-12 19:54:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8620689655172415) internal successors, (1992), 696 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1992 transitions. [2021-06-12 19:54:35,776 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1992 transitions. Word has length 17 [2021-06-12 19:54:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:35,776 INFO L482 AbstractCegarLoop]: Abstraction has 697 states and 1992 transitions. [2021-06-12 19:54:35,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1992 transitions. [2021-06-12 19:54:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:35,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:35,777 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:35,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1657 [2021-06-12 19:54:35,977 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:35,978 INFO L82 PathProgramCache]: Analyzing trace with hash -286746594, now seen corresponding path program 229 times [2021-06-12 19:54:35,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:35,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413195440] [2021-06-12 19:54:35,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:36,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:36,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413195440] [2021-06-12 19:54:36,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413195440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:36,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609875136] [2021-06-12 19:54:36,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:36,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:36,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:36,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:36,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:36,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:36,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:36,266 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:36,266 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:36,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:36,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609875136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:36,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:36,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:36,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714603659] [2021-06-12 19:54:36,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:36,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:36,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:36,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:36,286 INFO L87 Difference]: Start difference. First operand 697 states and 1992 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:36,767 INFO L93 Difference]: Finished difference Result 840 states and 2242 transitions. [2021-06-12 19:54:36,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:54:36,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:36,768 INFO L225 Difference]: With dead ends: 840 [2021-06-12 19:54:36,768 INFO L226 Difference]: Without dead ends: 840 [2021-06-12 19:54:36,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:54:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-06-12 19:54:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 689. [2021-06-12 19:54:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 2.854651162790698) internal successors, (1964), 688 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1964 transitions. [2021-06-12 19:54:36,776 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1964 transitions. Word has length 17 [2021-06-12 19:54:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:36,776 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 1964 transitions. [2021-06-12 19:54:36,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1964 transitions. [2021-06-12 19:54:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:36,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:36,777 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:36,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-12 19:54:36,977 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:36,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1776151590, now seen corresponding path program 230 times [2021-06-12 19:54:36,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:36,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729218355] [2021-06-12 19:54:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:37,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:37,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729218355] [2021-06-12 19:54:37,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729218355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:37,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056370684] [2021-06-12 19:54:37,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:37,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:37,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:37,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:37,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:37,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:37,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:37,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:37,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:37,353 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:37,354 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:37,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:37,354 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:37,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056370684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:37,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:37,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:37,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127774192] [2021-06-12 19:54:37,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:37,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:37,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:37,377 INFO L87 Difference]: Start difference. First operand 689 states and 1964 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:37,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:37,660 INFO L93 Difference]: Finished difference Result 790 states and 2131 transitions. [2021-06-12 19:54:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:37,661 INFO L225 Difference]: With dead ends: 790 [2021-06-12 19:54:37,662 INFO L226 Difference]: Without dead ends: 790 [2021-06-12 19:54:37,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:37,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-06-12 19:54:37,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 690. [2021-06-12 19:54:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 2.856313497822932) internal successors, (1968), 689 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1968 transitions. [2021-06-12 19:54:37,669 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1968 transitions. Word has length 17 [2021-06-12 19:54:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:37,669 INFO L482 AbstractCegarLoop]: Abstraction has 690 states and 1968 transitions. [2021-06-12 19:54:37,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1968 transitions. [2021-06-12 19:54:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:37,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:37,669 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:37,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1664 [2021-06-12 19:54:37,870 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1799298558, now seen corresponding path program 231 times [2021-06-12 19:54:37,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:37,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441866693] [2021-06-12 19:54:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:37,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441866693] [2021-06-12 19:54:37,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441866693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:37,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047748554] [2021-06-12 19:54:37,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:37,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:37,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:38,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:38,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:38,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:38,096 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:38,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,131 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:38,131 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:38,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:38,131 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:38,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047748554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:38,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:38,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324925577] [2021-06-12 19:54:38,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:38,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:38,192 INFO L87 Difference]: Start difference. First operand 690 states and 1968 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:38,480 INFO L93 Difference]: Finished difference Result 733 states and 2033 transitions. [2021-06-12 19:54:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:38,481 INFO L225 Difference]: With dead ends: 733 [2021-06-12 19:54:38,481 INFO L226 Difference]: Without dead ends: 729 [2021-06-12 19:54:38,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:54:38,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-12 19:54:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 687. [2021-06-12 19:54:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 2.8542274052478134) internal successors, (1958), 686 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:38,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1958 transitions. [2021-06-12 19:54:38,488 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1958 transitions. Word has length 17 [2021-06-12 19:54:38,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:38,488 INFO L482 AbstractCegarLoop]: Abstraction has 687 states and 1958 transitions. [2021-06-12 19:54:38,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:38,489 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1958 transitions. [2021-06-12 19:54:38,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:38,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:38,489 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:38,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:38,706 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:38,706 INFO L82 PathProgramCache]: Analyzing trace with hash -766621404, now seen corresponding path program 232 times [2021-06-12 19:54:38,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:38,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199021296] [2021-06-12 19:54:38,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:38,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:38,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199021296] [2021-06-12 19:54:38,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199021296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:38,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231398926] [2021-06-12 19:54:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:38,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:38,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:38,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:38,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:38,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:38,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:38,980 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:38,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:38,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:38,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:38,999 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:39,002 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,030 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:54:39,030 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:39,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:39,031 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:54:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:39,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231398926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:39,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:39,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:39,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767046821] [2021-06-12 19:54:39,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:39,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:39,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:39,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:39,058 INFO L87 Difference]: Start difference. First operand 687 states and 1958 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:39,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:39,401 INFO L93 Difference]: Finished difference Result 733 states and 2026 transitions. [2021-06-12 19:54:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:39,401 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:39,402 INFO L225 Difference]: With dead ends: 733 [2021-06-12 19:54:39,402 INFO L226 Difference]: Without dead ends: 725 [2021-06-12 19:54:39,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:54:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-06-12 19:54:39,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 685. [2021-06-12 19:54:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 2.8523391812865495) internal successors, (1951), 684 states have internal predecessors, (1951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1951 transitions. [2021-06-12 19:54:39,409 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1951 transitions. Word has length 17 [2021-06-12 19:54:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:39,409 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 1951 transitions. [2021-06-12 19:54:39,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1951 transitions. [2021-06-12 19:54:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:39,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:39,410 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:39,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-12 19:54:39,627 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1294238398, now seen corresponding path program 233 times [2021-06-12 19:54:39,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:39,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515085068] [2021-06-12 19:54:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:54:39,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515085068] [2021-06-12 19:54:39,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515085068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704271674] [2021-06-12 19:54:39,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:39,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:39,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:39,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:39,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:39,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:39,916 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:39,919 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:39,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:39,923 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:39,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:39,954 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:54:39,954 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:39,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:39,955 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:54:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:39,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704271674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:39,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:39,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:54:39,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562238760] [2021-06-12 19:54:39,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:54:39,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:39,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:54:39,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:39,982 INFO L87 Difference]: Start difference. First operand 685 states and 1951 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:40,257 INFO L93 Difference]: Finished difference Result 718 states and 1996 transitions. [2021-06-12 19:54:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:40,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:40,258 INFO L225 Difference]: With dead ends: 718 [2021-06-12 19:54:40,258 INFO L226 Difference]: Without dead ends: 706 [2021-06-12 19:54:40,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:54:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-06-12 19:54:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 684. [2021-06-12 19:54:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.8506588579795022) internal successors, (1947), 683 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1947 transitions. [2021-06-12 19:54:40,265 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1947 transitions. Word has length 17 [2021-06-12 19:54:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:40,265 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1947 transitions. [2021-06-12 19:54:40,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1947 transitions. [2021-06-12 19:54:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:40,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:40,266 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:40,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1680,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:40,466 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:40,466 INFO L82 PathProgramCache]: Analyzing trace with hash -902314216, now seen corresponding path program 234 times [2021-06-12 19:54:40,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:40,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136574767] [2021-06-12 19:54:40,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:40,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:40,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136574767] [2021-06-12 19:54:40,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136574767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:40,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206274493] [2021-06-12 19:54:40,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:40,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:40,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:40,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:40,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:40,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:40,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:40,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:40,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:40,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:40,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:40,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:40,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:40,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:40,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:40,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:40,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:40,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:40,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:40,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:40,793 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:40,793 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:40,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:40,794 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:40,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206274493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:40,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:40,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:40,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292990761] [2021-06-12 19:54:40,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:40,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:40,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:40,854 INFO L87 Difference]: Start difference. First operand 684 states and 1947 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:41,239 INFO L93 Difference]: Finished difference Result 854 states and 2269 transitions. [2021-06-12 19:54:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:41,240 INFO L225 Difference]: With dead ends: 854 [2021-06-12 19:54:41,240 INFO L226 Difference]: Without dead ends: 854 [2021-06-12 19:54:41,241 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:54:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-06-12 19:54:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 711. [2021-06-12 19:54:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 2.876056338028169) internal successors, (2042), 710 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 2042 transitions. [2021-06-12 19:54:41,248 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 2042 transitions. Word has length 17 [2021-06-12 19:54:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:41,248 INFO L482 AbstractCegarLoop]: Abstraction has 711 states and 2042 transitions. [2021-06-12 19:54:41,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:41,248 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 2042 transitions. [2021-06-12 19:54:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:41,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:41,249 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:41,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1687 [2021-06-12 19:54:41,450 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:41,450 INFO L82 PathProgramCache]: Analyzing trace with hash -100697988, now seen corresponding path program 235 times [2021-06-12 19:54:41,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:41,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208128171] [2021-06-12 19:54:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:41,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:41,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208128171] [2021-06-12 19:54:41,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208128171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:41,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512561150] [2021-06-12 19:54:41,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:41,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:41,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:41,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:41,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:41,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:41,713 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:41,745 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:41,745 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:41,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:41,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:41,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512561150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:41,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:41,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:41,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996900737] [2021-06-12 19:54:41,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:41,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:41,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:41,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:41,815 INFO L87 Difference]: Start difference. First operand 711 states and 2042 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:42,761 INFO L93 Difference]: Finished difference Result 893 states and 2372 transitions. [2021-06-12 19:54:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:54:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:42,763 INFO L225 Difference]: With dead ends: 893 [2021-06-12 19:54:42,763 INFO L226 Difference]: Without dead ends: 882 [2021-06-12 19:54:42,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 886.4ms TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:54:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-12 19:54:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 733. [2021-06-12 19:54:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 2.8948087431693987) internal successors, (2119), 732 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 2119 transitions. [2021-06-12 19:54:42,770 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 2119 transitions. Word has length 17 [2021-06-12 19:54:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:42,770 INFO L482 AbstractCegarLoop]: Abstraction has 733 states and 2119 transitions. [2021-06-12 19:54:42,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 2119 transitions. [2021-06-12 19:54:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:42,775 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:42,775 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:42,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1691,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:42,975 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:42,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1617645718, now seen corresponding path program 236 times [2021-06-12 19:54:42,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:42,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833815158] [2021-06-12 19:54:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:43,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:43,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833815158] [2021-06-12 19:54:43,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833815158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:43,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662739207] [2021-06-12 19:54:43,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:43,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:43,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:43,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:43,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:43,238 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:43,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:43,272 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:43,272 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:43,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:43,272 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:43,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662739207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:43,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:43,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:43,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969945811] [2021-06-12 19:54:43,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:43,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:43,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:43,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:43,320 INFO L87 Difference]: Start difference. First operand 733 states and 2119 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:43,855 INFO L93 Difference]: Finished difference Result 885 states and 2372 transitions. [2021-06-12 19:54:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:54:43,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:43,856 INFO L225 Difference]: With dead ends: 885 [2021-06-12 19:54:43,856 INFO L226 Difference]: Without dead ends: 885 [2021-06-12 19:54:43,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 526.6ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:54:43,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-06-12 19:54:43,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 743. [2021-06-12 19:54:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 2.881401617250674) internal successors, (2138), 742 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:43,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2138 transitions. [2021-06-12 19:54:43,864 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2138 transitions. Word has length 17 [2021-06-12 19:54:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:43,864 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2138 transitions. [2021-06-12 19:54:43,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:43,864 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2138 transitions. [2021-06-12 19:54:43,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:43,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:43,865 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:44,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1696 [2021-06-12 19:54:44,066 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:44,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash -92967590, now seen corresponding path program 237 times [2021-06-12 19:54:44,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:44,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130960936] [2021-06-12 19:54:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:44,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:44,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130960936] [2021-06-12 19:54:44,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130960936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:44,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263195516] [2021-06-12 19:54:44,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:44,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:54:44,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:44,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:44,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:44,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:44,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:44,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:44,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:44,349 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:44,350 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:44,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:44,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:44,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263195516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:44,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:44,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092809181] [2021-06-12 19:54:44,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:44,373 INFO L87 Difference]: Start difference. First operand 743 states and 2138 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:45,181 INFO L93 Difference]: Finished difference Result 925 states and 2443 transitions. [2021-06-12 19:54:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:54:45,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:45,182 INFO L225 Difference]: With dead ends: 925 [2021-06-12 19:54:45,182 INFO L226 Difference]: Without dead ends: 925 [2021-06-12 19:54:45,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:54:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-06-12 19:54:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 740. [2021-06-12 19:54:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8687415426251692) internal successors, (2120), 739 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2120 transitions. [2021-06-12 19:54:45,190 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2120 transitions. Word has length 17 [2021-06-12 19:54:45,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:45,190 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2120 transitions. [2021-06-12 19:54:45,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:45,190 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2120 transitions. [2021-06-12 19:54:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:45,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:45,191 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:45,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:45,391 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:45,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:45,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1582372586, now seen corresponding path program 238 times [2021-06-12 19:54:45,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:45,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539165933] [2021-06-12 19:54:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:45,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539165933] [2021-06-12 19:54:45,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539165933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:45,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956013240] [2021-06-12 19:54:45,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:45,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:45,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:45,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:45,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:45,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:45,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:45,671 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:45,671 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:45,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:45,672 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:45,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956013240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:45,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:45,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:45,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364241444] [2021-06-12 19:54:45,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:45,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:45,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:45,693 INFO L87 Difference]: Start difference. First operand 740 states and 2120 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:46,680 INFO L93 Difference]: Finished difference Result 999 states and 2576 transitions. [2021-06-12 19:54:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:54:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:46,682 INFO L225 Difference]: With dead ends: 999 [2021-06-12 19:54:46,682 INFO L226 Difference]: Without dead ends: 999 [2021-06-12 19:54:46,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 833.8ms TimeCoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:54:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-12 19:54:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 734. [2021-06-12 19:54:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.8663028649386084) internal successors, (2101), 733 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2101 transitions. [2021-06-12 19:54:46,690 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2101 transitions. Word has length 17 [2021-06-12 19:54:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:46,690 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2101 transitions. [2021-06-12 19:54:46,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2101 transitions. [2021-06-12 19:54:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:46,690 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:46,690 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:46,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1703 [2021-06-12 19:54:46,891 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:46,891 INFO L82 PathProgramCache]: Analyzing trace with hash -509287206, now seen corresponding path program 239 times [2021-06-12 19:54:46,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:46,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23198599] [2021-06-12 19:54:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:46,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:46,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23198599] [2021-06-12 19:54:46,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23198599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:46,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873953856] [2021-06-12 19:54:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:46,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:54:46,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:46,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:47,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:47,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:47,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,168 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:47,168 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:47,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,169 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:47,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873953856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:47,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:47,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:54:47,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702731084] [2021-06-12 19:54:47,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:54:47,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:47,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:54:47,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:47,191 INFO L87 Difference]: Start difference. First operand 734 states and 2101 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:47,410 INFO L93 Difference]: Finished difference Result 850 states and 2297 transitions. [2021-06-12 19:54:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:54:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:47,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:47,412 INFO L225 Difference]: With dead ends: 850 [2021-06-12 19:54:47,412 INFO L226 Difference]: Without dead ends: 850 [2021-06-12 19:54:47,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:54:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-06-12 19:54:47,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 737. [2021-06-12 19:54:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8668478260869565) internal successors, (2110), 736 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2110 transitions. [2021-06-12 19:54:47,419 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2110 transitions. Word has length 17 [2021-06-12 19:54:47,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:47,419 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2110 transitions. [2021-06-12 19:54:47,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:47,419 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2110 transitions. [2021-06-12 19:54:47,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:47,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:47,420 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:47,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1706,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:47,620 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:47,621 INFO L82 PathProgramCache]: Analyzing trace with hash 879028154, now seen corresponding path program 240 times [2021-06-12 19:54:47,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:47,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355884870] [2021-06-12 19:54:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:47,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:47,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355884870] [2021-06-12 19:54:47,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355884870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:47,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619867582] [2021-06-12 19:54:47,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:47,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:47,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:47,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:47,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:47,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:47,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,838 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 19:54:47,839 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:47,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:47,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 19:54:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:47,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619867582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:47,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:47,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:54:47,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592974252] [2021-06-12 19:54:47,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:47,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:47,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:47,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:47,859 INFO L87 Difference]: Start difference. First operand 737 states and 2110 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:48,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:48,014 INFO L93 Difference]: Finished difference Result 1005 states and 2818 transitions. [2021-06-12 19:54:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:48,015 INFO L225 Difference]: With dead ends: 1005 [2021-06-12 19:54:48,015 INFO L226 Difference]: Without dead ends: 1005 [2021-06-12 19:54:48,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:54:48,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-06-12 19:54:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 736. [2021-06-12 19:54:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.869387755102041) internal successors, (2109), 735 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2109 transitions. [2021-06-12 19:54:48,023 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2109 transitions. Word has length 17 [2021-06-12 19:54:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:48,023 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2109 transitions. [2021-06-12 19:54:48,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:48,023 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2109 transitions. [2021-06-12 19:54:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:48,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:48,024 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1709 [2021-06-12 19:54:48,225 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash 744702690, now seen corresponding path program 241 times [2021-06-12 19:54:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491313402] [2021-06-12 19:54:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:48,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:48,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:48,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491313402] [2021-06-12 19:54:48,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491313402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:48,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170253312] [2021-06-12 19:54:48,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:48,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:48,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:48,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:48,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:48,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:48,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:54:48,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:48,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:48,463 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:48,466 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:48,489 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-12 19:54:48,489 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:48,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:48,490 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 19:54:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:48,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170253312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:48,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:48,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:54:48,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159249465] [2021-06-12 19:54:48,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:54:48,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:48,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:54:48,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:54:48,517 INFO L87 Difference]: Start difference. First operand 736 states and 2109 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:48,871 INFO L93 Difference]: Finished difference Result 1001 states and 2805 transitions. [2021-06-12 19:54:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:48,872 INFO L225 Difference]: With dead ends: 1001 [2021-06-12 19:54:48,872 INFO L226 Difference]: Without dead ends: 996 [2021-06-12 19:54:48,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 365.3ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:54:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-12 19:54:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 736. [2021-06-12 19:54:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.8680272108843536) internal successors, (2108), 735 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2108 transitions. [2021-06-12 19:54:48,880 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2108 transitions. Word has length 17 [2021-06-12 19:54:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:48,880 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2108 transitions. [2021-06-12 19:54:48,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2108 transitions. [2021-06-12 19:54:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:48,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:48,881 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:49,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1711,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:49,085 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:49,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:49,085 INFO L82 PathProgramCache]: Analyzing trace with hash -773925220, now seen corresponding path program 242 times [2021-06-12 19:54:49,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:49,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910147725] [2021-06-12 19:54:49,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:49,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:49,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:49,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910147725] [2021-06-12 19:54:49,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910147725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:49,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025774482] [2021-06-12 19:54:49,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:49,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:49,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:49,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:49,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:49,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:49,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:49,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:49,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:49,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:49,349 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:49,349 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:49,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:49,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:49,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025774482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:49,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:49,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:49,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805201523] [2021-06-12 19:54:49,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:49,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:49,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:49,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:49,370 INFO L87 Difference]: Start difference. First operand 736 states and 2108 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:49,561 INFO L93 Difference]: Finished difference Result 1006 states and 2820 transitions. [2021-06-12 19:54:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:54:49,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:49,564 INFO L225 Difference]: With dead ends: 1006 [2021-06-12 19:54:49,564 INFO L226 Difference]: Without dead ends: 1006 [2021-06-12 19:54:49,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-12 19:54:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 737. [2021-06-12 19:54:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8682065217391304) internal successors, (2111), 736 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:49,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2111 transitions. [2021-06-12 19:54:49,572 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2111 transitions. Word has length 17 [2021-06-12 19:54:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:49,572 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2111 transitions. [2021-06-12 19:54:49,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2111 transitions. [2021-06-12 19:54:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:49,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:49,573 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:49,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1718,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:49,789 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash 156957368, now seen corresponding path program 243 times [2021-06-12 19:54:49,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:49,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102573424] [2021-06-12 19:54:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:49,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:49,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102573424] [2021-06-12 19:54:49,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102573424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:49,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778922948] [2021-06-12 19:54:49,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:49,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:49,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:50,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:50,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:50,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:50,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:50,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:50,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:50,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:50,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:50,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:50,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:50,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:50,095 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:50,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:50,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:50,098 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:50,127 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:54:50,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:50,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:50,128 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:54:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:50,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778922948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:50,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:50,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:50,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765221964] [2021-06-12 19:54:50,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:50,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:50,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:50,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:50,156 INFO L87 Difference]: Start difference. First operand 737 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:50,593 INFO L93 Difference]: Finished difference Result 1003 states and 2809 transitions. [2021-06-12 19:54:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:50,594 INFO L225 Difference]: With dead ends: 1003 [2021-06-12 19:54:50,594 INFO L226 Difference]: Without dead ends: 999 [2021-06-12 19:54:50,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:54:50,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-12 19:54:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 737. [2021-06-12 19:54:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.8668478260869565) internal successors, (2110), 736 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2110 transitions. [2021-06-12 19:54:50,602 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2110 transitions. Word has length 17 [2021-06-12 19:54:50,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:50,602 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 2110 transitions. [2021-06-12 19:54:50,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2110 transitions. [2021-06-12 19:54:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:50,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:50,603 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:50,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1721,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:50,803 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:50,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:50,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1934947334, now seen corresponding path program 244 times [2021-06-12 19:54:50,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:50,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764362757] [2021-06-12 19:54:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:50,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764362757] [2021-06-12 19:54:50,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764362757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130434479] [2021-06-12 19:54:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:50,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:50,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:50,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:50,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:51,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:51,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:51,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:51,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,063 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:51,063 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:51,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:51,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:51,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130434479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:51,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:51,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:51,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570507910] [2021-06-12 19:54:51,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:51,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:51,084 INFO L87 Difference]: Start difference. First operand 737 states and 2110 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:51,574 INFO L93 Difference]: Finished difference Result 1031 states and 2870 transitions. [2021-06-12 19:54:51,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:54:51,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:51,575 INFO L225 Difference]: With dead ends: 1031 [2021-06-12 19:54:51,575 INFO L226 Difference]: Without dead ends: 1031 [2021-06-12 19:54:51,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:54:51,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-12 19:54:51,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 740. [2021-06-12 19:54:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.8673883626522327) internal successors, (2119), 739 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2119 transitions. [2021-06-12 19:54:51,583 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2119 transitions. Word has length 17 [2021-06-12 19:54:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:51,583 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2119 transitions. [2021-06-12 19:54:51,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2119 transitions. [2021-06-12 19:54:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:51,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:51,584 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:51,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:51,784 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:51,785 INFO L82 PathProgramCache]: Analyzing trace with hash -380898210, now seen corresponding path program 245 times [2021-06-12 19:54:51,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:51,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96297360] [2021-06-12 19:54:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:51,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:51,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96297360] [2021-06-12 19:54:51,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96297360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:51,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63879203] [2021-06-12 19:54:51,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:51,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:51,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:52,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:52,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:52,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:52,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:52,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:52,055 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:52,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:52,061 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:52,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:52,064 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,093 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:54:52,094 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:52,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:52,094 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:54:52,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:52,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63879203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:52,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:52,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:52,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235418884] [2021-06-12 19:54:52,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:52,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:52,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:52,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:52,124 INFO L87 Difference]: Start difference. First operand 740 states and 2119 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:52,542 INFO L93 Difference]: Finished difference Result 1012 states and 2827 transitions. [2021-06-12 19:54:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:54:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:52,543 INFO L225 Difference]: With dead ends: 1012 [2021-06-12 19:54:52,543 INFO L226 Difference]: Without dead ends: 1009 [2021-06-12 19:54:52,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:54:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-12 19:54:52,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 742. [2021-06-12 19:54:52,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.866396761133603) internal successors, (2124), 741 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2124 transitions. [2021-06-12 19:54:52,551 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2124 transitions. Word has length 17 [2021-06-12 19:54:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:52,551 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2124 transitions. [2021-06-12 19:54:52,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2124 transitions. [2021-06-12 19:54:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:52,552 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:52,552 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:52,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1731 [2021-06-12 19:54:52,752 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:52,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1695304996, now seen corresponding path program 246 times [2021-06-12 19:54:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:52,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251768059] [2021-06-12 19:54:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:52,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:52,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251768059] [2021-06-12 19:54:52,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251768059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:52,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283467099] [2021-06-12 19:54:52,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:52,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:54:52,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:52,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:52,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:52,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:52,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:52,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:52,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:52,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:52,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:52,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,011 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:53,011 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:53,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:53,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:53,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283467099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:53,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:53,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:53,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722396020] [2021-06-12 19:54:53,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:53,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:53,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:53,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:53,031 INFO L87 Difference]: Start difference. First operand 742 states and 2124 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:53,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:53,569 INFO L93 Difference]: Finished difference Result 1104 states and 2998 transitions. [2021-06-12 19:54:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:54:53,570 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:53,571 INFO L225 Difference]: With dead ends: 1104 [2021-06-12 19:54:53,571 INFO L226 Difference]: Without dead ends: 1104 [2021-06-12 19:54:53,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:54:53,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-12 19:54:53,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 753. [2021-06-12 19:54:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 2.875) internal successors, (2162), 752 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2162 transitions. [2021-06-12 19:54:53,579 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2162 transitions. Word has length 17 [2021-06-12 19:54:53,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:53,579 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2162 transitions. [2021-06-12 19:54:53,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2162 transitions. [2021-06-12 19:54:53,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:53,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:53,580 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:53,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1738,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:53,780 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1679961592, now seen corresponding path program 247 times [2021-06-12 19:54:53,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:53,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818958333] [2021-06-12 19:54:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:53,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:53,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818958333] [2021-06-12 19:54:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818958333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:53,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178432581] [2021-06-12 19:54:53,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:53,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:53,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:54,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:54,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:54,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:54,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:54,048 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:54,051 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:54,054 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,082 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:54:54,082 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:54,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:54,083 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:54:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:54,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178432581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:54,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:54,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:54,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44664810] [2021-06-12 19:54:54,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:54,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:54,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:54,110 INFO L87 Difference]: Start difference. First operand 753 states and 2162 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:54,541 INFO L93 Difference]: Finished difference Result 1026 states and 2871 transitions. [2021-06-12 19:54:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:54:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:54,542 INFO L225 Difference]: With dead ends: 1026 [2021-06-12 19:54:54,542 INFO L226 Difference]: Without dead ends: 1024 [2021-06-12 19:54:54,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 409.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:54:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-12 19:54:54,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 755. [2021-06-12 19:54:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.874005305039788) internal successors, (2167), 754 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2167 transitions. [2021-06-12 19:54:54,550 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2167 transitions. Word has length 17 [2021-06-12 19:54:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:54,550 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2167 transitions. [2021-06-12 19:54:54,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2167 transitions. [2021-06-12 19:54:54,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:54,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:54,551 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:54,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1741 [2021-06-12 19:54:54,758 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1687574598, now seen corresponding path program 248 times [2021-06-12 19:54:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:54,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278667500] [2021-06-12 19:54:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:54,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:54,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278667500] [2021-06-12 19:54:54,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278667500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:54,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393070878] [2021-06-12 19:54:54,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:54,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:54:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:54,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:54,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:54,983 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:54,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:54,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:54,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:55,019 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:55,019 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:55,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:55,019 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:55,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393070878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:55,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:55,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:55,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640444286] [2021-06-12 19:54:55,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:55,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:55,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:55,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:55,067 INFO L87 Difference]: Start difference. First operand 755 states and 2167 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:55,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:55,683 INFO L93 Difference]: Finished difference Result 1115 states and 3013 transitions. [2021-06-12 19:54:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:54:55,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:55,685 INFO L225 Difference]: With dead ends: 1115 [2021-06-12 19:54:55,685 INFO L226 Difference]: Without dead ends: 1115 [2021-06-12 19:54:55,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 499.7ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:54:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-12 19:54:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 762. [2021-06-12 19:54:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.8804204993429696) internal successors, (2192), 761 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2192 transitions. [2021-06-12 19:54:55,693 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2192 transitions. Word has length 17 [2021-06-12 19:54:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:55,694 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2192 transitions. [2021-06-12 19:54:55,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:55,694 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2192 transitions. [2021-06-12 19:54:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:55,694 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:55,694 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:55,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:55,895 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:55,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash -885958370, now seen corresponding path program 249 times [2021-06-12 19:54:55,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:55,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579251876] [2021-06-12 19:54:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:55,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:55,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:55,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579251876] [2021-06-12 19:54:55,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579251876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:55,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460650475] [2021-06-12 19:54:55,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:56,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:54:56,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:56,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:56,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:56,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:56,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:56,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:56,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:56,170 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:56,170 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:56,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:56,171 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:56,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460650475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:56,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:56,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:56,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793904533] [2021-06-12 19:54:56,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:56,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:56,233 INFO L87 Difference]: Start difference. First operand 762 states and 2192 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:56,848 INFO L93 Difference]: Finished difference Result 1062 states and 2940 transitions. [2021-06-12 19:54:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:54:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:56,849 INFO L225 Difference]: With dead ends: 1062 [2021-06-12 19:54:56,849 INFO L226 Difference]: Without dead ends: 1059 [2021-06-12 19:54:56,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 624.6ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:54:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-06-12 19:54:56,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 764. [2021-06-12 19:54:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 2.8807339449541285) internal successors, (2198), 763 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2198 transitions. [2021-06-12 19:54:56,858 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2198 transitions. Word has length 17 [2021-06-12 19:54:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:56,858 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2198 transitions. [2021-06-12 19:54:56,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2198 transitions. [2021-06-12 19:54:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:56,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:56,858 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:57,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1752,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:57,061 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash 832385336, now seen corresponding path program 250 times [2021-06-12 19:54:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:57,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417701217] [2021-06-12 19:54:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:57,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:57,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417701217] [2021-06-12 19:54:57,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417701217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:57,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061508150] [2021-06-12 19:54:57,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:57,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:54:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:57,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:57,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:57,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:57,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:57,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:57,309 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:57,341 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:54:57,341 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:57,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:54:57,342 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:54:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:57,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061508150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:57,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:57,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:57,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330352061] [2021-06-12 19:54:57,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:57,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:57,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:57,393 INFO L87 Difference]: Start difference. First operand 764 states and 2198 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:57,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:57,772 INFO L93 Difference]: Finished difference Result 1051 states and 2924 transitions. [2021-06-12 19:54:57,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:54:57,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:57,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:57,773 INFO L225 Difference]: With dead ends: 1051 [2021-06-12 19:54:57,773 INFO L226 Difference]: Without dead ends: 1051 [2021-06-12 19:54:57,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:54:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-12 19:54:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 762. [2021-06-12 19:54:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.8777923784494086) internal successors, (2190), 761 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2190 transitions. [2021-06-12 19:54:57,782 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2190 transitions. Word has length 17 [2021-06-12 19:54:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:57,782 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2190 transitions. [2021-06-12 19:54:57,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2190 transitions. [2021-06-12 19:54:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:57,782 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:57,782 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:57,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1758,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:57,983 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:57,983 INFO L82 PathProgramCache]: Analyzing trace with hash 111873060, now seen corresponding path program 251 times [2021-06-12 19:54:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:57,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850915732] [2021-06-12 19:54:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:58,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850915732] [2021-06-12 19:54:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850915732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595682875] [2021-06-12 19:54:58,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:58,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:54:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:58,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:58,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:58,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:58,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:58,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,263 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:58,263 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:58,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:58,264 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:58,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595682875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:58,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:58,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:58,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352105308] [2021-06-12 19:54:58,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:58,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:58,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:58,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:58,284 INFO L87 Difference]: Start difference. First operand 762 states and 2190 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:58,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:58,522 INFO L93 Difference]: Finished difference Result 875 states and 2459 transitions. [2021-06-12 19:54:58,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:54:58,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:58,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:58,523 INFO L225 Difference]: With dead ends: 875 [2021-06-12 19:54:58,523 INFO L226 Difference]: Without dead ends: 875 [2021-06-12 19:54:58,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-06-12 19:54:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 768. [2021-06-12 19:54:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.876140808344198) internal successors, (2206), 767 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2206 transitions. [2021-06-12 19:54:58,531 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2206 transitions. Word has length 17 [2021-06-12 19:54:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:58,531 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2206 transitions. [2021-06-12 19:54:58,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2206 transitions. [2021-06-12 19:54:58,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:58,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:58,532 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:58,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1762,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:58,732 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:58,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1042755648, now seen corresponding path program 252 times [2021-06-12 19:54:58,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:58,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252341836] [2021-06-12 19:54:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:58,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:58,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:58,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252341836] [2021-06-12 19:54:58,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252341836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:58,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966065426] [2021-06-12 19:54:58,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:58,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:54:58,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:54:58,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:59,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:59,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:59,012 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:54:59,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:59,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:54:59,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:54:59,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,053 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:54:59,053 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:59,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:54:59,054 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:54:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:59,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966065426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:59,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:59,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:59,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121816193] [2021-06-12 19:54:59,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:59,082 INFO L87 Difference]: Start difference. First operand 768 states and 2206 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:54:59,387 INFO L93 Difference]: Finished difference Result 866 states and 2433 transitions. [2021-06-12 19:54:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:54:59,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:54:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:54:59,388 INFO L225 Difference]: With dead ends: 866 [2021-06-12 19:54:59,388 INFO L226 Difference]: Without dead ends: 862 [2021-06-12 19:54:59,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:54:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-06-12 19:54:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 770. [2021-06-12 19:54:59,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.869960988296489) internal successors, (2207), 769 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2207 transitions. [2021-06-12 19:54:59,396 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2207 transitions. Word has length 17 [2021-06-12 19:54:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:54:59,396 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2207 transitions. [2021-06-12 19:54:59,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:54:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2207 transitions. [2021-06-12 19:54:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:54:59,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:54:59,397 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:54:59,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1765 [2021-06-12 19:54:59,599 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:54:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:54:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1049149054, now seen corresponding path program 253 times [2021-06-12 19:54:59,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:54:59,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619560535] [2021-06-12 19:54:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:54:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:59,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:54:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619560535] [2021-06-12 19:54:59,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619560535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:59,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019376170] [2021-06-12 19:54:59,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:54:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:54:59,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:54:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:54:59,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:54:59,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:54:59,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:54:59,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,852 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:54:59,852 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:54:59,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:54:59,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:54:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:54:59,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019376170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:54:59,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:54:59,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:54:59,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373106895] [2021-06-12 19:54:59,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:54:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:54:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:54:59,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:54:59,873 INFO L87 Difference]: Start difference. First operand 770 states and 2207 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:00,382 INFO L93 Difference]: Finished difference Result 885 states and 2480 transitions. [2021-06-12 19:55:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:00,383 INFO L225 Difference]: With dead ends: 885 [2021-06-12 19:55:00,383 INFO L226 Difference]: Without dead ends: 885 [2021-06-12 19:55:00,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2021-06-12 19:55:00,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 767. [2021-06-12 19:55:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 2.877284595300261) internal successors, (2204), 766 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2204 transitions. [2021-06-12 19:55:00,391 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2204 transitions. Word has length 17 [2021-06-12 19:55:00,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:00,391 INFO L482 AbstractCegarLoop]: Abstraction has 767 states and 2204 transitions. [2021-06-12 19:55:00,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:00,391 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2204 transitions. [2021-06-12 19:55:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:00,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:00,392 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:00,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1772 [2021-06-12 19:55:00,595 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash 504900070, now seen corresponding path program 254 times [2021-06-12 19:55:00,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:00,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447640230] [2021-06-12 19:55:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:00,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:00,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447640230] [2021-06-12 19:55:00,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447640230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:00,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599497406] [2021-06-12 19:55:00,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:00,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:00,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:00,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:00,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:00,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:00,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:00,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:00,871 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:00,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:00,875 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:00,904 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:00,904 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:00,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:00,905 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:00,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599497406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:00,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:00,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:00,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301495652] [2021-06-12 19:55:00,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:00,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:00,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:00,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:00,937 INFO L87 Difference]: Start difference. First operand 767 states and 2204 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:01,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:01,173 INFO L93 Difference]: Finished difference Result 860 states and 2428 transitions. [2021-06-12 19:55:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:01,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:01,174 INFO L225 Difference]: With dead ends: 860 [2021-06-12 19:55:01,174 INFO L226 Difference]: Without dead ends: 857 [2021-06-12 19:55:01,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:55:01,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-12 19:55:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 768. [2021-06-12 19:55:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.876140808344198) internal successors, (2206), 767 states have internal predecessors, (2206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:01,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2206 transitions. [2021-06-12 19:55:01,182 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2206 transitions. Word has length 17 [2021-06-12 19:55:01,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:01,182 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 2206 transitions. [2021-06-12 19:55:01,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:01,182 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2206 transitions. [2021-06-12 19:55:01,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:01,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:01,183 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:01,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1775 [2021-06-12 19:55:01,384 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:01,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:01,384 INFO L82 PathProgramCache]: Analyzing trace with hash -809506716, now seen corresponding path program 255 times [2021-06-12 19:55:01,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:01,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760667038] [2021-06-12 19:55:01,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:01,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:01,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760667038] [2021-06-12 19:55:01,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760667038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:01,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753407854] [2021-06-12 19:55:01,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:01,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:01,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:01,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:01,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:01,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:01,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:01,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:01,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:01,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:01,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:01,687 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:01,687 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:01,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:01,688 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:01,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753407854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:01,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:01,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:01,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428662119] [2021-06-12 19:55:01,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:01,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:01,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:01,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:01,710 INFO L87 Difference]: Start difference. First operand 768 states and 2206 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:02,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:02,417 INFO L93 Difference]: Finished difference Result 955 states and 2603 transitions. [2021-06-12 19:55:02,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:55:02,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:02,418 INFO L225 Difference]: With dead ends: 955 [2021-06-12 19:55:02,418 INFO L226 Difference]: Without dead ends: 955 [2021-06-12 19:55:02,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:02,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-12 19:55:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 779. [2021-06-12 19:55:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 2.884318766066838) internal successors, (2244), 778 states have internal predecessors, (2244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:02,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2244 transitions. [2021-06-12 19:55:02,426 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2244 transitions. Word has length 17 [2021-06-12 19:55:02,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:02,426 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2244 transitions. [2021-06-12 19:55:02,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:02,426 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2244 transitions. [2021-06-12 19:55:02,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:02,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:02,427 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:02,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1782 [2021-06-12 19:55:02,627 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:02,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1729207424, now seen corresponding path program 256 times [2021-06-12 19:55:02,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:02,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16334082] [2021-06-12 19:55:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:02,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:02,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16334082] [2021-06-12 19:55:02,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16334082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:02,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898421298] [2021-06-12 19:55:02,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:02,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:02,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:02,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:02,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:02,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:02,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:02,907 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:02,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:02,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:02,939 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:02,940 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:02,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:02,941 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:02,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898421298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:02,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:02,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:02,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602731662] [2021-06-12 19:55:02,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:02,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:02,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:02,968 INFO L87 Difference]: Start difference. First operand 779 states and 2244 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:03,355 INFO L93 Difference]: Finished difference Result 893 states and 2501 transitions. [2021-06-12 19:55:03,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:55:03,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:03,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:03,357 INFO L225 Difference]: With dead ends: 893 [2021-06-12 19:55:03,357 INFO L226 Difference]: Without dead ends: 891 [2021-06-12 19:55:03,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:55:03,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-12 19:55:03,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 784. [2021-06-12 19:55:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.8850574712643677) internal successors, (2259), 783 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2259 transitions. [2021-06-12 19:55:03,364 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2259 transitions. Word has length 17 [2021-06-12 19:55:03,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:03,365 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 2259 transitions. [2021-06-12 19:55:03,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:03,365 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2259 transitions. [2021-06-12 19:55:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:03,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:03,365 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:03,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1785 [2021-06-12 19:55:03,566 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash -801776318, now seen corresponding path program 257 times [2021-06-12 19:55:03,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:03,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93770124] [2021-06-12 19:55:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:03,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:03,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:03,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93770124] [2021-06-12 19:55:03,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93770124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:03,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491699047] [2021-06-12 19:55:03,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:03,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:03,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:03,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:03,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:03,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:03,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:03,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:03,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:03,817 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:03,817 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:03,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:03,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:03,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491699047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:03,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:03,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:03,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439522724] [2021-06-12 19:55:03,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:03,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:03,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:03,866 INFO L87 Difference]: Start difference. First operand 784 states and 2259 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:04,428 INFO L93 Difference]: Finished difference Result 980 states and 2646 transitions. [2021-06-12 19:55:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:04,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:04,430 INFO L225 Difference]: With dead ends: 980 [2021-06-12 19:55:04,430 INFO L226 Difference]: Without dead ends: 980 [2021-06-12 19:55:04,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-06-12 19:55:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 774. [2021-06-12 19:55:04,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8783958602846056) internal successors, (2225), 773 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:04,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2225 transitions. [2021-06-12 19:55:04,438 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2225 transitions. Word has length 17 [2021-06-12 19:55:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:04,438 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2225 transitions. [2021-06-12 19:55:04,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2225 transitions. [2021-06-12 19:55:04,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:04,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:04,439 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:04,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1792,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:04,640 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:04,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:04,640 INFO L82 PathProgramCache]: Analyzing trace with hash -160090, now seen corresponding path program 258 times [2021-06-12 19:55:04,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:04,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058963532] [2021-06-12 19:55:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:04,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:04,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058963532] [2021-06-12 19:55:04,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058963532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:04,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234092153] [2021-06-12 19:55:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:04,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:04,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:04,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:04,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:04,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:04,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:04,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:04,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:04,900 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:04,900 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:04,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:04,901 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:04,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:04,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234092153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:04,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:04,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:04,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062185827] [2021-06-12 19:55:04,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:04,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:04,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:04,964 INFO L87 Difference]: Start difference. First operand 774 states and 2225 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:05,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:05,396 INFO L93 Difference]: Finished difference Result 898 states and 2493 transitions. [2021-06-12 19:55:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:05,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:05,397 INFO L225 Difference]: With dead ends: 898 [2021-06-12 19:55:05,397 INFO L226 Difference]: Without dead ends: 895 [2021-06-12 19:55:05,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-06-12 19:55:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 776. [2021-06-12 19:55:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.878709677419355) internal successors, (2231), 775 states have internal predecessors, (2231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2231 transitions. [2021-06-12 19:55:05,405 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2231 transitions. Word has length 17 [2021-06-12 19:55:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:05,405 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2231 transitions. [2021-06-12 19:55:05,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2231 transitions. [2021-06-12 19:55:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:05,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:05,406 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:05,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-06-12 19:55:05,606 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1718183616, now seen corresponding path program 259 times [2021-06-12 19:55:05,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:05,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674853016] [2021-06-12 19:55:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:05,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:05,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674853016] [2021-06-12 19:55:05,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674853016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:05,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674523323] [2021-06-12 19:55:05,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:05,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:05,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:05,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:05,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:05,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:05,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:05,875 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:05,875 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:05,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:05,876 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:05,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:05,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674523323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:05,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:05,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:05,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407512092] [2021-06-12 19:55:05,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:05,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:05,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:05,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:05,926 INFO L87 Difference]: Start difference. First operand 776 states and 2231 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:06,195 INFO L93 Difference]: Finished difference Result 896 states and 2491 transitions. [2021-06-12 19:55:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:55:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:06,196 INFO L225 Difference]: With dead ends: 896 [2021-06-12 19:55:06,196 INFO L226 Difference]: Without dead ends: 896 [2021-06-12 19:55:06,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 282.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:06,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-12 19:55:06,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 770. [2021-06-12 19:55:06,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 2.8764629388816645) internal successors, (2212), 769 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2212 transitions. [2021-06-12 19:55:06,203 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2212 transitions. Word has length 17 [2021-06-12 19:55:06,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:06,203 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2212 transitions. [2021-06-12 19:55:06,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:06,203 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2212 transitions. [2021-06-12 19:55:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:06,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:06,204 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:06,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1802 [2021-06-12 19:55:06,405 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:06,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:06,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2143240642, now seen corresponding path program 260 times [2021-06-12 19:55:06,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:06,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932065722] [2021-06-12 19:55:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:06,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:06,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932065722] [2021-06-12 19:55:06,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932065722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:06,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747430177] [2021-06-12 19:55:06,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:06,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:06,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:06,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:06,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:06,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:06,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:06,661 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,684 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:06,684 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:06,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:06,685 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:06,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:06,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747430177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:06,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:06,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:06,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964301781] [2021-06-12 19:55:06,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:06,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:06,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:06,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:06,705 INFO L87 Difference]: Start difference. First operand 770 states and 2212 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:06,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:06,991 INFO L93 Difference]: Finished difference Result 897 states and 2509 transitions. [2021-06-12 19:55:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:06,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:06,992 INFO L225 Difference]: With dead ends: 897 [2021-06-12 19:55:06,992 INFO L226 Difference]: Without dead ends: 897 [2021-06-12 19:55:06,992 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:55:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-06-12 19:55:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 774. [2021-06-12 19:55:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8771021992238035) internal successors, (2224), 773 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2224 transitions. [2021-06-12 19:55:07,003 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2224 transitions. Word has length 17 [2021-06-12 19:55:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:07,004 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2224 transitions. [2021-06-12 19:55:07,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2224 transitions. [2021-06-12 19:55:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:07,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:07,004 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:07,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:07,205 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash -589191518, now seen corresponding path program 261 times [2021-06-12 19:55:07,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:07,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137442411] [2021-06-12 19:55:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:07,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:07,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137442411] [2021-06-12 19:55:07,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137442411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:07,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215938539] [2021-06-12 19:55:07,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:07,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:07,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:07,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:07,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:07,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:07,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:07,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:07,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:07,449 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:07,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:07,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:07,482 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:07,482 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:07,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:07,483 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:07,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:07,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215938539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:07,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:07,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:07,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272248284] [2021-06-12 19:55:07,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:07,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:07,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:07,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:07,510 INFO L87 Difference]: Start difference. First operand 774 states and 2224 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:07,875 INFO L93 Difference]: Finished difference Result 869 states and 2447 transitions. [2021-06-12 19:55:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:07,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:07,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:07,876 INFO L225 Difference]: With dead ends: 869 [2021-06-12 19:55:07,876 INFO L226 Difference]: Without dead ends: 863 [2021-06-12 19:55:07,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 351.6ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:55:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-06-12 19:55:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 774. [2021-06-12 19:55:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.8732212160413972) internal successors, (2221), 773 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2221 transitions. [2021-06-12 19:55:07,884 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2221 transitions. Word has length 17 [2021-06-12 19:55:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:07,884 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2221 transitions. [2021-06-12 19:55:07,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2221 transitions. [2021-06-12 19:55:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:07,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:07,885 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:08,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1809 [2021-06-12 19:55:08,085 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash -288346720, now seen corresponding path program 262 times [2021-06-12 19:55:08,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:08,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280705153] [2021-06-12 19:55:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:08,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280705153] [2021-06-12 19:55:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280705153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429314449] [2021-06-12 19:55:08,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:08,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:08,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:08,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:08,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:08,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:08,294 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:08,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:08,297 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:08,329 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:08,329 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:08,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:08,330 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:08,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429314449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:08,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:08,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771087676] [2021-06-12 19:55:08,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:08,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:08,398 INFO L87 Difference]: Start difference. First operand 774 states and 2221 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:09,039 INFO L93 Difference]: Finished difference Result 915 states and 2541 transitions. [2021-06-12 19:55:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:55:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:09,040 INFO L225 Difference]: With dead ends: 915 [2021-06-12 19:55:09,040 INFO L226 Difference]: Without dead ends: 911 [2021-06-12 19:55:09,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:09,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-06-12 19:55:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 787. [2021-06-12 19:55:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.880407124681934) internal successors, (2264), 786 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 2264 transitions. [2021-06-12 19:55:09,048 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 2264 transitions. Word has length 17 [2021-06-12 19:55:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:09,048 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 2264 transitions. [2021-06-12 19:55:09,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 2264 transitions. [2021-06-12 19:55:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:09,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:09,049 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:09,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1816,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:09,249 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash -830512924, now seen corresponding path program 263 times [2021-06-12 19:55:09,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:09,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488144570] [2021-06-12 19:55:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:09,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488144570] [2021-06-12 19:55:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488144570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271141729] [2021-06-12 19:55:09,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:09,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:09,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:09,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:09,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:09,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:09,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:09,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,494 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:09,494 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:09,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:09,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:09,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271141729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:09,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:09,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:09,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11693190] [2021-06-12 19:55:09,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:09,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:09,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:09,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:09,515 INFO L87 Difference]: Start difference. First operand 787 states and 2264 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:10,032 INFO L93 Difference]: Finished difference Result 1030 states and 2774 transitions. [2021-06-12 19:55:10,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:55:10,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:10,033 INFO L225 Difference]: With dead ends: 1030 [2021-06-12 19:55:10,033 INFO L226 Difference]: Without dead ends: 1030 [2021-06-12 19:55:10,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-12 19:55:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 811. [2021-06-12 19:55:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.8925925925925924) internal successors, (2343), 810 states have internal predecessors, (2343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:10,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2343 transitions. [2021-06-12 19:55:10,042 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2343 transitions. Word has length 17 [2021-06-12 19:55:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:10,042 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2343 transitions. [2021-06-12 19:55:10,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2343 transitions. [2021-06-12 19:55:10,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:10,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:10,043 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:10,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1821 [2021-06-12 19:55:10,244 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1750213632, now seen corresponding path program 264 times [2021-06-12 19:55:10,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:10,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85717556] [2021-06-12 19:55:10,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:10,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:10,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85717556] [2021-06-12 19:55:10,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85717556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164901594] [2021-06-12 19:55:10,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:10,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:10,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:10,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:10,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:10,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:10,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:10,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:10,500 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:10,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:10,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:10,533 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:10,533 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:10,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:10,534 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:10,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164901594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:10,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:10,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:10,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904264246] [2021-06-12 19:55:10,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:10,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:10,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:10,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:10,562 INFO L87 Difference]: Start difference. First operand 811 states and 2343 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:11,147 INFO L93 Difference]: Finished difference Result 957 states and 2638 transitions. [2021-06-12 19:55:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:55:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:11,148 INFO L225 Difference]: With dead ends: 957 [2021-06-12 19:55:11,148 INFO L226 Difference]: Without dead ends: 953 [2021-06-12 19:55:11,148 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:11,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-12 19:55:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 811. [2021-06-12 19:55:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 2.8814814814814813) internal successors, (2334), 810 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:11,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2334 transitions. [2021-06-12 19:55:11,156 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2334 transitions. Word has length 17 [2021-06-12 19:55:11,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:11,156 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2334 transitions. [2021-06-12 19:55:11,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2334 transitions. [2021-06-12 19:55:11,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:11,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:11,157 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:11,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1824 [2021-06-12 19:55:11,357 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:11,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:11,358 INFO L82 PathProgramCache]: Analyzing trace with hash 784738660, now seen corresponding path program 265 times [2021-06-12 19:55:11,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:11,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666349189] [2021-06-12 19:55:11,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:11,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:11,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666349189] [2021-06-12 19:55:11,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666349189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:11,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59281330] [2021-06-12 19:55:11,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:11,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:11,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:11,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:11,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:11,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:11,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:11,598 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:11,598 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:11,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:11,599 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59281330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:11,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:11,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:11,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679924537] [2021-06-12 19:55:11,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:11,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:11,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:11,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:11,666 INFO L87 Difference]: Start difference. First operand 811 states and 2334 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:12,582 INFO L93 Difference]: Finished difference Result 1032 states and 2765 transitions. [2021-06-12 19:55:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 19:55:12,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:12,584 INFO L225 Difference]: With dead ends: 1032 [2021-06-12 19:55:12,584 INFO L226 Difference]: Without dead ends: 1027 [2021-06-12 19:55:12,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 697.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:55:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-06-12 19:55:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 815. [2021-06-12 19:55:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.8771498771498774) internal successors, (2342), 814 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2342 transitions. [2021-06-12 19:55:12,593 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2342 transitions. Word has length 17 [2021-06-12 19:55:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:12,593 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2342 transitions. [2021-06-12 19:55:12,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2342 transitions. [2021-06-12 19:55:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:12,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:12,594 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:12,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1831,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:12,794 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1982779774, now seen corresponding path program 266 times [2021-06-12 19:55:12,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:12,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817440714] [2021-06-12 19:55:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:12,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:12,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817440714] [2021-06-12 19:55:12,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817440714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:12,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410769263] [2021-06-12 19:55:12,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:12,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:12,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:12,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:12,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:12,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:13,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:13,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:13,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:13,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:13,042 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:13,042 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:13,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:13,043 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:13,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410769263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:13,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:13,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:13,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132760986] [2021-06-12 19:55:13,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:13,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:13,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:13,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:13,091 INFO L87 Difference]: Start difference. First operand 815 states and 2342 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:13,698 INFO L93 Difference]: Finished difference Result 1074 states and 2852 transitions. [2021-06-12 19:55:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:55:13,699 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:13,703 INFO L225 Difference]: With dead ends: 1074 [2021-06-12 19:55:13,703 INFO L226 Difference]: Without dead ends: 1074 [2021-06-12 19:55:13,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:55:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-12 19:55:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 828. [2021-06-12 19:55:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.8851269649334945) internal successors, (2386), 827 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2386 transitions. [2021-06-12 19:55:13,712 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2386 transitions. Word has length 17 [2021-06-12 19:55:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:13,712 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2386 transitions. [2021-06-12 19:55:13,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2386 transitions. [2021-06-12 19:55:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:13,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:13,713 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:13,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1836,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:13,913 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:13,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1510571294, now seen corresponding path program 267 times [2021-06-12 19:55:13,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:13,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079104901] [2021-06-12 19:55:13,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:14,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:14,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079104901] [2021-06-12 19:55:14,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079104901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:14,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681553154] [2021-06-12 19:55:14,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:14,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:14,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:14,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:14,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:14,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:14,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:14,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:14,162 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:14,162 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:14,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:14,163 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:14,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681553154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:14,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:14,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:14,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678317677] [2021-06-12 19:55:14,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:14,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:14,226 INFO L87 Difference]: Start difference. First operand 828 states and 2386 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:15,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:15,179 INFO L93 Difference]: Finished difference Result 1059 states and 2837 transitions. [2021-06-12 19:55:15,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 19:55:15,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:15,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:15,181 INFO L225 Difference]: With dead ends: 1059 [2021-06-12 19:55:15,181 INFO L226 Difference]: Without dead ends: 1051 [2021-06-12 19:55:15,181 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 772.2ms TimeCoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:55:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-12 19:55:15,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 840. [2021-06-12 19:55:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.8724672228843864) internal successors, (2410), 839 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2410 transitions. [2021-06-12 19:55:15,190 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2410 transitions. Word has length 17 [2021-06-12 19:55:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:15,190 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2410 transitions. [2021-06-12 19:55:15,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:15,190 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2410 transitions. [2021-06-12 19:55:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:15,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:15,191 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:15,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1840,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:15,391 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:15,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:15,391 INFO L82 PathProgramCache]: Analyzing trace with hash 207772412, now seen corresponding path program 268 times [2021-06-12 19:55:15,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:15,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095402731] [2021-06-12 19:55:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:15,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095402731] [2021-06-12 19:55:15,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095402731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710501147] [2021-06-12 19:55:15,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:15,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:15,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:15,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:15,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:15,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:15,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:15,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:15,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:15,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:15,630 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:15,630 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:15,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:15,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710501147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:15,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:15,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:15,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630984861] [2021-06-12 19:55:15,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:15,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:15,701 INFO L87 Difference]: Start difference. First operand 840 states and 2410 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:16,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:16,337 INFO L93 Difference]: Finished difference Result 1048 states and 2825 transitions. [2021-06-12 19:55:16,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:55:16,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:16,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:16,339 INFO L225 Difference]: With dead ends: 1048 [2021-06-12 19:55:16,339 INFO L226 Difference]: Without dead ends: 1048 [2021-06-12 19:55:16,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-06-12 19:55:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 836. [2021-06-12 19:55:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.867065868263473) internal successors, (2394), 835 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2394 transitions. [2021-06-12 19:55:16,347 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2394 transitions. Word has length 17 [2021-06-12 19:55:16,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:16,348 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2394 transitions. [2021-06-12 19:55:16,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:16,348 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2394 transitions. [2021-06-12 19:55:16,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:16,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:16,348 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:16,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1846,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:16,549 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1502840896, now seen corresponding path program 269 times [2021-06-12 19:55:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:16,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883571339] [2021-06-12 19:55:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:16,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:16,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883571339] [2021-06-12 19:55:16,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883571339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:16,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254466181] [2021-06-12 19:55:16,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:16,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:55:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:16,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:16,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:16,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,794 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:55:16,795 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:16,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:16,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:55:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:16,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254466181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:16,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:16,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 19:55:16,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40298998] [2021-06-12 19:55:16,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:16,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:16,818 INFO L87 Difference]: Start difference. First operand 836 states and 2394 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:17,166 INFO L93 Difference]: Finished difference Result 1074 states and 2888 transitions. [2021-06-12 19:55:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:55:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:17,167 INFO L225 Difference]: With dead ends: 1074 [2021-06-12 19:55:17,167 INFO L226 Difference]: Without dead ends: 1074 [2021-06-12 19:55:17,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:17,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-12 19:55:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 836. [2021-06-12 19:55:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.867065868263473) internal successors, (2394), 835 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2394 transitions. [2021-06-12 19:55:17,176 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2394 transitions. Word has length 17 [2021-06-12 19:55:17,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:17,176 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2394 transitions. [2021-06-12 19:55:17,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,176 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2394 transitions. [2021-06-12 19:55:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:17,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:17,177 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:17,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1850,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:17,378 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1801815964, now seen corresponding path program 270 times [2021-06-12 19:55:17,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:17,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859770507] [2021-06-12 19:55:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:17,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:17,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859770507] [2021-06-12 19:55:17,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859770507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:17,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986458244] [2021-06-12 19:55:17,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:17,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:55:17,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:17,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:17,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:17,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:17,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:17,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:17,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:17,688 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:17,688 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:17,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:17,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:17,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986458244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:17,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:17,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:17,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354344822] [2021-06-12 19:55:17,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:17,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:17,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:17,716 INFO L87 Difference]: Start difference. First operand 836 states and 2394 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:17,923 INFO L93 Difference]: Finished difference Result 964 states and 2644 transitions. [2021-06-12 19:55:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:17,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:17,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:17,924 INFO L225 Difference]: With dead ends: 964 [2021-06-12 19:55:17,924 INFO L226 Difference]: Without dead ends: 964 [2021-06-12 19:55:17,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2021-06-12 19:55:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 861. [2021-06-12 19:55:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.8686046511627907) internal successors, (2467), 860 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2467 transitions. [2021-06-12 19:55:17,933 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2467 transitions. Word has length 17 [2021-06-12 19:55:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:17,933 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2467 transitions. [2021-06-12 19:55:17,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2467 transitions. [2021-06-12 19:55:17,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:17,934 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:17,934 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:18,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1852,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:18,135 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:18,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1562268744, now seen corresponding path program 271 times [2021-06-12 19:55:18,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:18,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575870837] [2021-06-12 19:55:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:18,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:18,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575870837] [2021-06-12 19:55:18,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575870837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:18,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181704313] [2021-06-12 19:55:18,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:18,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:18,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:18,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:18,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:18,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:18,428 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:18,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:18,431 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:18,461 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:18,461 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:18,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:18,462 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:18,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181704313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:18,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:18,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:18,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394602564] [2021-06-12 19:55:18,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:18,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:18,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:18,492 INFO L87 Difference]: Start difference. First operand 861 states and 2467 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:18,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:18,931 INFO L93 Difference]: Finished difference Result 945 states and 2596 transitions. [2021-06-12 19:55:18,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:55:18,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:18,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:18,932 INFO L225 Difference]: With dead ends: 945 [2021-06-12 19:55:18,932 INFO L226 Difference]: Without dead ends: 937 [2021-06-12 19:55:18,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-06-12 19:55:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 866. [2021-06-12 19:55:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.8578034682080924) internal successors, (2472), 865 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2472 transitions. [2021-06-12 19:55:18,940 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2472 transitions. Word has length 17 [2021-06-12 19:55:18,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:18,941 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2472 transitions. [2021-06-12 19:55:18,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2472 transitions. [2021-06-12 19:55:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:18,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:18,941 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:19,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1855 [2021-06-12 19:55:19,142 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:19,142 INFO L82 PathProgramCache]: Analyzing trace with hash 640793850, now seen corresponding path program 272 times [2021-06-12 19:55:19,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:19,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560906352] [2021-06-12 19:55:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:19,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:19,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560906352] [2021-06-12 19:55:19,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560906352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:19,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644866267] [2021-06-12 19:55:19,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:19,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:19,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:19,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:19,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:19,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:19,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:19,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:19,426 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:19,426 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:19,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:19,427 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:19,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644866267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:19,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:19,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:19,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66715884] [2021-06-12 19:55:19,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:19,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:19,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:19,448 INFO L87 Difference]: Start difference. First operand 866 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:20,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:20,342 INFO L93 Difference]: Finished difference Result 1023 states and 2750 transitions. [2021-06-12 19:55:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:55:20,343 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:20,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:20,344 INFO L225 Difference]: With dead ends: 1023 [2021-06-12 19:55:20,344 INFO L226 Difference]: Without dead ends: 1023 [2021-06-12 19:55:20,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 789.9ms TimeCoverageRelationStatistics Valid=243, Invalid=1649, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:55:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-06-12 19:55:20,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 862. [2021-06-12 19:55:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8664343786295006) internal successors, (2468), 861 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2468 transitions. [2021-06-12 19:55:20,353 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2468 transitions. Word has length 17 [2021-06-12 19:55:20,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:20,353 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2468 transitions. [2021-06-12 19:55:20,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2468 transitions. [2021-06-12 19:55:20,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:20,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:20,354 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:20,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1862 [2021-06-12 19:55:20,557 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2100124322, now seen corresponding path program 273 times [2021-06-12 19:55:20,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:20,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853203471] [2021-06-12 19:55:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:20,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:20,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853203471] [2021-06-12 19:55:20,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853203471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:20,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537649104] [2021-06-12 19:55:20,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:20,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:20,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:20,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:20,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:20,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:20,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:20,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:20,864 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:20,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:20,868 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:20,898 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:20,898 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:20,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:20,899 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:20,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537649104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:20,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:20,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:20,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377813467] [2021-06-12 19:55:20,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:20,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:20,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:20,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:20,927 INFO L87 Difference]: Start difference. First operand 862 states and 2468 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:21,508 INFO L93 Difference]: Finished difference Result 947 states and 2603 transitions. [2021-06-12 19:55:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:55:21,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:21,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:21,509 INFO L225 Difference]: With dead ends: 947 [2021-06-12 19:55:21,509 INFO L226 Difference]: Without dead ends: 944 [2021-06-12 19:55:21,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2021-06-12 19:55:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 865. [2021-06-12 19:55:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.8622685185185186) internal successors, (2473), 864 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2473 transitions. [2021-06-12 19:55:21,518 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2473 transitions. Word has length 17 [2021-06-12 19:55:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:21,518 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2473 transitions. [2021-06-12 19:55:21,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2473 transitions. [2021-06-12 19:55:21,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:21,518 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:21,519 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:21,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1865 [2021-06-12 19:55:21,719 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:21,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:21,719 INFO L82 PathProgramCache]: Analyzing trace with hash 880436188, now seen corresponding path program 274 times [2021-06-12 19:55:21,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:21,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131483397] [2021-06-12 19:55:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:21,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131483397] [2021-06-12 19:55:21,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131483397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:21,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683590909] [2021-06-12 19:55:21,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:21,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:21,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:21,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:21,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:22,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:22,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:22,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:22,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,035 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:22,035 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:22,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:22,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:22,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683590909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:22,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:22,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:22,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293608675] [2021-06-12 19:55:22,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:22,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:22,056 INFO L87 Difference]: Start difference. First operand 865 states and 2473 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:22,917 INFO L93 Difference]: Finished difference Result 1010 states and 2733 transitions. [2021-06-12 19:55:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:55:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:22,919 INFO L225 Difference]: With dead ends: 1010 [2021-06-12 19:55:22,919 INFO L226 Difference]: Without dead ends: 1010 [2021-06-12 19:55:22,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 629.8ms TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:55:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-12 19:55:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 862. [2021-06-12 19:55:22,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.8710801393728222) internal successors, (2472), 861 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:22,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2472 transitions. [2021-06-12 19:55:22,927 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2472 transitions. Word has length 17 [2021-06-12 19:55:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:22,927 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2472 transitions. [2021-06-12 19:55:22,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2472 transitions. [2021-06-12 19:55:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:22,928 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:22,928 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:23,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1872,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:23,129 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash -39264520, now seen corresponding path program 275 times [2021-06-12 19:55:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:23,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626721871] [2021-06-12 19:55:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:23,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:23,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626721871] [2021-06-12 19:55:23,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626721871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:23,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94843553] [2021-06-12 19:55:23,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:23,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:23,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:23,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:23,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:23,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:23,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:23,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:23,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:23,407 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:23,410 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:23,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:23,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:23,443 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:23,443 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:23,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:23,444 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:23,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:23,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94843553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:23,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:23,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:23,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026163569] [2021-06-12 19:55:23,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:23,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:23,477 INFO L87 Difference]: Start difference. First operand 862 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:23,832 INFO L93 Difference]: Finished difference Result 902 states and 2550 transitions. [2021-06-12 19:55:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:23,833 INFO L225 Difference]: With dead ends: 902 [2021-06-12 19:55:23,833 INFO L226 Difference]: Without dead ends: 898 [2021-06-12 19:55:23,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-06-12 19:55:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 863. [2021-06-12 19:55:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.8677494199535962) internal successors, (2472), 862 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2472 transitions. [2021-06-12 19:55:23,841 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2472 transitions. Word has length 17 [2021-06-12 19:55:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:23,842 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2472 transitions. [2021-06-12 19:55:23,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:23,842 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2472 transitions. [2021-06-12 19:55:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:23,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:23,842 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:24,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1875,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:24,043 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash 888166586, now seen corresponding path program 276 times [2021-06-12 19:55:24,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:24,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939013127] [2021-06-12 19:55:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:24,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:24,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939013127] [2021-06-12 19:55:24,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939013127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:24,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765685951] [2021-06-12 19:55:24,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:24,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:24,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:24,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:24,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:24,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:24,322 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:24,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:24,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:24,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:24,360 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:24,360 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:24,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:24,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:24,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765685951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:24,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:24,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:24,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126903952] [2021-06-12 19:55:24,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:24,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:24,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:24,410 INFO L87 Difference]: Start difference. First operand 863 states and 2472 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:24,989 INFO L93 Difference]: Finished difference Result 1025 states and 2754 transitions. [2021-06-12 19:55:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:55:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:24,991 INFO L225 Difference]: With dead ends: 1025 [2021-06-12 19:55:24,991 INFO L226 Difference]: Without dead ends: 1025 [2021-06-12 19:55:24,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 479.4ms TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-12 19:55:24,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 853. [2021-06-12 19:55:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.8615023474178405) internal successors, (2438), 852 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2438 transitions. [2021-06-12 19:55:25,000 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2438 transitions. Word has length 17 [2021-06-12 19:55:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:25,000 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2438 transitions. [2021-06-12 19:55:25,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:25,000 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2438 transitions. [2021-06-12 19:55:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:25,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:25,001 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:25,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1882 [2021-06-12 19:55:25,205 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1689782814, now seen corresponding path program 277 times [2021-06-12 19:55:25,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:25,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667340913] [2021-06-12 19:55:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:25,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:25,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667340913] [2021-06-12 19:55:25,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667340913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:25,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301178024] [2021-06-12 19:55:25,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:25,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:25,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:25,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:25,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:25,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:25,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:25,486 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:25,486 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:25,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:25,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:25,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301178024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:25,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:25,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632727991] [2021-06-12 19:55:25,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:25,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:25,551 INFO L87 Difference]: Start difference. First operand 853 states and 2438 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:26,216 INFO L93 Difference]: Finished difference Result 987 states and 2678 transitions. [2021-06-12 19:55:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:55:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:26,217 INFO L225 Difference]: With dead ends: 987 [2021-06-12 19:55:26,217 INFO L226 Difference]: Without dead ends: 983 [2021-06-12 19:55:26,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:26,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-12 19:55:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 866. [2021-06-12 19:55:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.871676300578035) internal successors, (2484), 865 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2484 transitions. [2021-06-12 19:55:26,226 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2484 transitions. Word has length 17 [2021-06-12 19:55:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:26,226 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2484 transitions. [2021-06-12 19:55:26,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2484 transitions. [2021-06-12 19:55:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:26,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:26,227 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:26,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1886,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:26,428 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash -886840776, now seen corresponding path program 278 times [2021-06-12 19:55:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:26,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602637493] [2021-06-12 19:55:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:26,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:26,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:26,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602637493] [2021-06-12 19:55:26,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602637493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:26,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678566185] [2021-06-12 19:55:26,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:26,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:26,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:26,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:26,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:26,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:26,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:26,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:26,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:26,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:26,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:26,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:26,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:26,705 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:26,705 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:26,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:26,705 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:26,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:26,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678566185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:26,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:26,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:26,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782766011] [2021-06-12 19:55:26,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:26,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:26,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:26,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:26,756 INFO L87 Difference]: Start difference. First operand 866 states and 2484 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,082 INFO L93 Difference]: Finished difference Result 970 states and 2653 transitions. [2021-06-12 19:55:27,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,083 INFO L225 Difference]: With dead ends: 970 [2021-06-12 19:55:27,083 INFO L226 Difference]: Without dead ends: 970 [2021-06-12 19:55:27,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 337.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:55:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-06-12 19:55:27,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 859. [2021-06-12 19:55:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 2.865967365967366) internal successors, (2459), 858 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2459 transitions. [2021-06-12 19:55:27,092 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2459 transitions. Word has length 17 [2021-06-12 19:55:27,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,092 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2459 transitions. [2021-06-12 19:55:27,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,092 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2459 transitions. [2021-06-12 19:55:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:27,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,092 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:27,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1892 [2021-06-12 19:55:27,293 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:27,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:27,293 INFO L82 PathProgramCache]: Analyzing trace with hash -10398598, now seen corresponding path program 279 times [2021-06-12 19:55:27,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:27,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829768602] [2021-06-12 19:55:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:27,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829768602] [2021-06-12 19:55:27,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829768602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907939324] [2021-06-12 19:55:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:27,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:27,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:27,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:27,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:27,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:27,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:27,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,553 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:27,553 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:27,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:27,554 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:27,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907939324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:27,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:27,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:27,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553897186] [2021-06-12 19:55:27,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:27,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:27,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:27,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:27,573 INFO L87 Difference]: Start difference. First operand 859 states and 2459 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:27,825 INFO L93 Difference]: Finished difference Result 996 states and 2738 transitions. [2021-06-12 19:55:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:27,826 INFO L225 Difference]: With dead ends: 996 [2021-06-12 19:55:27,826 INFO L226 Difference]: Without dead ends: 996 [2021-06-12 19:55:27,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-06-12 19:55:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 875. [2021-06-12 19:55:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.871853546910755) internal successors, (2510), 874 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2510 transitions. [2021-06-12 19:55:27,835 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2510 transitions. Word has length 17 [2021-06-12 19:55:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:27,835 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2510 transitions. [2021-06-12 19:55:27,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2510 transitions. [2021-06-12 19:55:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:27,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:27,836 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:28,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1896,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:28,036 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1543650526, now seen corresponding path program 280 times [2021-06-12 19:55:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:28,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321359139] [2021-06-12 19:55:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:28,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:28,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321359139] [2021-06-12 19:55:28,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321359139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:28,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201504436] [2021-06-12 19:55:28,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:28,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:28,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:28,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:28,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:28,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:28,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:28,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:28,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:28,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:28,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:28,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:28,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:28,331 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:28,331 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:28,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:28,332 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:28,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201504436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:28,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:28,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:28,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579705492] [2021-06-12 19:55:28,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:28,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:28,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:28,362 INFO L87 Difference]: Start difference. First operand 875 states and 2510 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:28,828 INFO L93 Difference]: Finished difference Result 943 states and 2624 transitions. [2021-06-12 19:55:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:55:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:28,829 INFO L225 Difference]: With dead ends: 943 [2021-06-12 19:55:28,829 INFO L226 Difference]: Without dead ends: 937 [2021-06-12 19:55:28,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-06-12 19:55:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 876. [2021-06-12 19:55:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.865142857142857) internal successors, (2507), 875 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2507 transitions. [2021-06-12 19:55:28,837 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2507 transitions. Word has length 17 [2021-06-12 19:55:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:28,837 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2507 transitions. [2021-06-12 19:55:28,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:28,837 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2507 transitions. [2021-06-12 19:55:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:28,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:28,838 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:29,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1899 [2021-06-12 19:55:29,039 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 229243740, now seen corresponding path program 281 times [2021-06-12 19:55:29,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:29,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256061626] [2021-06-12 19:55:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:29,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:29,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256061626] [2021-06-12 19:55:29,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256061626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572342935] [2021-06-12 19:55:29,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:29,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:29,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:29,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:29,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:29,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:29,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:29,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:29,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,305 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:29,305 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:29,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:29,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:29,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572342935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:29,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:29,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:29,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897908507] [2021-06-12 19:55:29,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:29,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:29,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:29,330 INFO L87 Difference]: Start difference. First operand 876 states and 2507 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:29,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:29,979 INFO L93 Difference]: Finished difference Result 1010 states and 2764 transitions. [2021-06-12 19:55:29,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:55:29,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:29,980 INFO L225 Difference]: With dead ends: 1010 [2021-06-12 19:55:29,980 INFO L226 Difference]: Without dead ends: 1010 [2021-06-12 19:55:29,980 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:55:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-12 19:55:29,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 878. [2021-06-12 19:55:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.8677309007981755) internal successors, (2515), 877 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2515 transitions. [2021-06-12 19:55:29,989 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2515 transitions. Word has length 17 [2021-06-12 19:55:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:29,989 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2515 transitions. [2021-06-12 19:55:29,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2515 transitions. [2021-06-12 19:55:29,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:29,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:29,990 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:30,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1906,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:30,190 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash -690456968, now seen corresponding path program 282 times [2021-06-12 19:55:30,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:30,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601219996] [2021-06-12 19:55:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:30,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:30,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601219996] [2021-06-12 19:55:30,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601219996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:30,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152576203] [2021-06-12 19:55:30,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:30,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:30,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:30,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:30,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:30,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:30,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:30,433 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:30,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:30,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:30,442 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:30,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:30,445 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:30,475 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:30,475 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:30,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:30,476 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:30,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152576203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:30,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:30,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:30,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812333366] [2021-06-12 19:55:30,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:30,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:30,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:30,503 INFO L87 Difference]: Start difference. First operand 878 states and 2515 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:31,060 INFO L93 Difference]: Finished difference Result 942 states and 2631 transitions. [2021-06-12 19:55:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:55:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:31,061 INFO L225 Difference]: With dead ends: 942 [2021-06-12 19:55:31,061 INFO L226 Difference]: Without dead ends: 938 [2021-06-12 19:55:31,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 468.6ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-12 19:55:31,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 881. [2021-06-12 19:55:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.8625) internal successors, (2519), 880 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:31,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2519 transitions. [2021-06-12 19:55:31,070 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2519 transitions. Word has length 17 [2021-06-12 19:55:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:31,070 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 2519 transitions. [2021-06-12 19:55:31,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2519 transitions. [2021-06-12 19:55:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:31,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:31,071 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:31,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1909 [2021-06-12 19:55:31,271 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:31,271 INFO L82 PathProgramCache]: Analyzing trace with hash 236974138, now seen corresponding path program 283 times [2021-06-12 19:55:31,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:31,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786621899] [2021-06-12 19:55:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:31,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786621899] [2021-06-12 19:55:31,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786621899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695515456] [2021-06-12 19:55:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:31,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:31,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:31,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:31,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:31,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:31,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:31,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:31,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:31,512 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:31,512 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:31,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:31,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:31,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:31,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695515456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:31,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:31,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:31,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430711643] [2021-06-12 19:55:31,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:31,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:31,560 INFO L87 Difference]: Start difference. First operand 881 states and 2519 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:32,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:32,094 INFO L93 Difference]: Finished difference Result 1004 states and 2739 transitions. [2021-06-12 19:55:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:55:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:32,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:32,095 INFO L225 Difference]: With dead ends: 1004 [2021-06-12 19:55:32,095 INFO L226 Difference]: Without dead ends: 1000 [2021-06-12 19:55:32,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-06-12 19:55:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 868. [2021-06-12 19:55:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.847750865051903) internal successors, (2469), 867 states have internal predecessors, (2469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:32,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2469 transitions. [2021-06-12 19:55:32,108 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2469 transitions. Word has length 17 [2021-06-12 19:55:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:32,108 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2469 transitions. [2021-06-12 19:55:32,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2469 transitions. [2021-06-12 19:55:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:32,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:32,109 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:32,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1916,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:32,309 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1038590366, now seen corresponding path program 284 times [2021-06-12 19:55:32,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:32,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441044559] [2021-06-12 19:55:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:32,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:32,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441044559] [2021-06-12 19:55:32,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441044559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:32,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217694173] [2021-06-12 19:55:32,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:32,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:32,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:32,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:32,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:32,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:32,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:32,519 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:32,551 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:32,551 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:32,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:32,552 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:32,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217694173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:32,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:32,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:32,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879081043] [2021-06-12 19:55:32,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:32,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:32,613 INFO L87 Difference]: Start difference. First operand 868 states and 2469 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:33,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:33,138 INFO L93 Difference]: Finished difference Result 951 states and 2639 transitions. [2021-06-12 19:55:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:55:33,139 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:33,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:33,140 INFO L225 Difference]: With dead ends: 951 [2021-06-12 19:55:33,140 INFO L226 Difference]: Without dead ends: 946 [2021-06-12 19:55:33,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:55:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-12 19:55:33,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 872. [2021-06-12 19:55:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 2.8495981630309988) internal successors, (2482), 871 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2482 transitions. [2021-06-12 19:55:33,148 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2482 transitions. Word has length 17 [2021-06-12 19:55:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:33,148 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2482 transitions. [2021-06-12 19:55:33,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2482 transitions. [2021-06-12 19:55:33,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:33,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:33,149 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:33,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1920,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:33,352 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:33,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:33,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1538033224, now seen corresponding path program 285 times [2021-06-12 19:55:33,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:33,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79810176] [2021-06-12 19:55:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:33,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79810176] [2021-06-12 19:55:33,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79810176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:33,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690630863] [2021-06-12 19:55:33,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:33,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:33,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:33,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:33,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:33,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:33,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:33,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:33,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:33,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:33,599 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:33,599 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:33,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:33,600 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:33,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690630863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:33,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:33,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:33,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795553468] [2021-06-12 19:55:33,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:33,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:33,649 INFO L87 Difference]: Start difference. First operand 872 states and 2482 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:34,050 INFO L93 Difference]: Finished difference Result 945 states and 2628 transitions. [2021-06-12 19:55:34,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:55:34,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:34,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:34,051 INFO L225 Difference]: With dead ends: 945 [2021-06-12 19:55:34,051 INFO L226 Difference]: Without dead ends: 945 [2021-06-12 19:55:34,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 374.5ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-06-12 19:55:34,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 862. [2021-06-12 19:55:34,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.849012775842044) internal successors, (2453), 861 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2453 transitions. [2021-06-12 19:55:34,059 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2453 transitions. Word has length 17 [2021-06-12 19:55:34,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:34,059 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2453 transitions. [2021-06-12 19:55:34,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,059 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2453 transitions. [2021-06-12 19:55:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:34,060 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:34,060 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:34,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1926 [2021-06-12 19:55:34,260 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 208237532, now seen corresponding path program 286 times [2021-06-12 19:55:34,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:34,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188225914] [2021-06-12 19:55:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:34,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:34,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:34,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188225914] [2021-06-12 19:55:34,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188225914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817011303] [2021-06-12 19:55:34,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:34,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:34,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:34,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:34,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:34,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:34,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,507 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:34,508 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:34,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:34,508 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:34,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817011303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:34,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:34,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:34,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685818736] [2021-06-12 19:55:34,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:34,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:34,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:34,533 INFO L87 Difference]: Start difference. First operand 862 states and 2453 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:34,790 INFO L93 Difference]: Finished difference Result 974 states and 2681 transitions. [2021-06-12 19:55:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:34,791 INFO L225 Difference]: With dead ends: 974 [2021-06-12 19:55:34,791 INFO L226 Difference]: Without dead ends: 974 [2021-06-12 19:55:34,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:55:34,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-06-12 19:55:34,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 861. [2021-06-12 19:55:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.85) internal successors, (2451), 860 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2451 transitions. [2021-06-12 19:55:34,800 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2451 transitions. Word has length 17 [2021-06-12 19:55:34,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:34,800 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2451 transitions. [2021-06-12 19:55:34,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:34,800 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2451 transitions. [2021-06-12 19:55:34,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:34,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:34,801 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:35,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1930,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:35,015 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:35,015 INFO L82 PathProgramCache]: Analyzing trace with hash -711463176, now seen corresponding path program 287 times [2021-06-12 19:55:35,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:35,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276192899] [2021-06-12 19:55:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:35,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276192899] [2021-06-12 19:55:35,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276192899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:35,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037021144] [2021-06-12 19:55:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:35,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:35,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:35,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:35,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:35,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:35,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:35,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:35,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:35,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:35,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:35,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:35,304 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:35,305 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:35,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:35,305 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:35,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037021144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:35,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:35,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:35,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132152308] [2021-06-12 19:55:35,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:35,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:35,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:35,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:35,336 INFO L87 Difference]: Start difference. First operand 861 states and 2451 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:35,803 INFO L93 Difference]: Finished difference Result 916 states and 2555 transitions. [2021-06-12 19:55:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:55:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:35,804 INFO L225 Difference]: With dead ends: 916 [2021-06-12 19:55:35,804 INFO L226 Difference]: Without dead ends: 912 [2021-06-12 19:55:35,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-06-12 19:55:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 861. [2021-06-12 19:55:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.8453488372093023) internal successors, (2447), 860 states have internal predecessors, (2447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2447 transitions. [2021-06-12 19:55:35,812 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2447 transitions. Word has length 17 [2021-06-12 19:55:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:35,812 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2447 transitions. [2021-06-12 19:55:35,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2447 transitions. [2021-06-12 19:55:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:35,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:35,813 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:36,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1933 [2021-06-12 19:55:36,014 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:36,014 INFO L82 PathProgramCache]: Analyzing trace with hash 215967930, now seen corresponding path program 288 times [2021-06-12 19:55:36,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:36,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242515137] [2021-06-12 19:55:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:36,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:36,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242515137] [2021-06-12 19:55:36,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242515137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499322801] [2021-06-12 19:55:36,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:36,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:36,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:36,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:36,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:36,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:36,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:36,208 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:36,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:36,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:36,243 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:36,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:36,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:36,243 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:36,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499322801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:36,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:36,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:36,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730092566] [2021-06-12 19:55:36,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:36,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:36,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:36,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:36,291 INFO L87 Difference]: Start difference. First operand 861 states and 2447 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:36,733 INFO L93 Difference]: Finished difference Result 970 states and 2638 transitions. [2021-06-12 19:55:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:55:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:36,734 INFO L225 Difference]: With dead ends: 970 [2021-06-12 19:55:36,734 INFO L226 Difference]: Without dead ends: 968 [2021-06-12 19:55:36,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:55:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-06-12 19:55:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 857. [2021-06-12 19:55:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.8376168224299065) internal successors, (2429), 856 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2429 transitions. [2021-06-12 19:55:36,743 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2429 transitions. Word has length 17 [2021-06-12 19:55:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:36,743 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2429 transitions. [2021-06-12 19:55:36,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:36,743 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2429 transitions. [2021-06-12 19:55:36,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:36,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:36,744 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:36,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1940,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:36,944 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:36,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1017584158, now seen corresponding path program 289 times [2021-06-12 19:55:36,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:36,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546819988] [2021-06-12 19:55:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:37,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:37,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546819988] [2021-06-12 19:55:37,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546819988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79343232] [2021-06-12 19:55:37,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:37,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:37,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:37,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:37,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:37,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:37,150 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:37,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:37,153 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:37,184 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:37,184 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:37,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:37,185 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:37,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79343232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:37,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:37,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278944037] [2021-06-12 19:55:37,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:37,248 INFO L87 Difference]: Start difference. First operand 857 states and 2429 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:37,716 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2021-06-12 19:55:38,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:38,261 INFO L93 Difference]: Finished difference Result 947 states and 2595 transitions. [2021-06-12 19:55:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:55:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:38,262 INFO L225 Difference]: With dead ends: 947 [2021-06-12 19:55:38,262 INFO L226 Difference]: Without dead ends: 943 [2021-06-12 19:55:38,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:55:38,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-12 19:55:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 864. [2021-06-12 19:55:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.8296639629200464) internal successors, (2442), 863 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2442 transitions. [2021-06-12 19:55:38,270 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2442 transitions. Word has length 17 [2021-06-12 19:55:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:38,270 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2442 transitions. [2021-06-12 19:55:38,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2442 transitions. [2021-06-12 19:55:38,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:38,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:38,271 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:38,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1944 [2021-06-12 19:55:38,472 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:38,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:38,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1559039432, now seen corresponding path program 290 times [2021-06-12 19:55:38,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:38,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268137740] [2021-06-12 19:55:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:38,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268137740] [2021-06-12 19:55:38,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268137740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372904679] [2021-06-12 19:55:38,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:38,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:38,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:38,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:38,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:38,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:38,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:38,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:38,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:38,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:38,712 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:38,712 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:38,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:38,712 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372904679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:38,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:38,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-12 19:55:38,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124009718] [2021-06-12 19:55:38,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:55:38,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:55:38,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:55:38,765 INFO L87 Difference]: Start difference. First operand 864 states and 2442 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:39,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:39,224 INFO L93 Difference]: Finished difference Result 939 states and 2592 transitions. [2021-06-12 19:55:39,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:39,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:39,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:39,225 INFO L225 Difference]: With dead ends: 939 [2021-06-12 19:55:39,225 INFO L226 Difference]: Without dead ends: 939 [2021-06-12 19:55:39,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 422.8ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-12 19:55:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 854. [2021-06-12 19:55:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.8253223915592027) internal successors, (2410), 853 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2410 transitions. [2021-06-12 19:55:39,233 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2410 transitions. Word has length 17 [2021-06-12 19:55:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:39,233 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2410 transitions. [2021-06-12 19:55:39,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2410 transitions. [2021-06-12 19:55:39,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:39,234 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:39,234 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:39,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1950,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:39,435 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:39,435 INFO L82 PathProgramCache]: Analyzing trace with hash -200351686, now seen corresponding path program 291 times [2021-06-12 19:55:39,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:39,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213211254] [2021-06-12 19:55:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:39,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:39,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213211254] [2021-06-12 19:55:39,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213211254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:39,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889712450] [2021-06-12 19:55:39,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:39,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:39,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:39,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:39,679 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:39,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:39,681 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:39,713 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:39,713 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:39,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:39,714 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:39,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889712450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:39,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:39,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:39,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885671039] [2021-06-12 19:55:39,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:39,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:39,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:39,762 INFO L87 Difference]: Start difference. First operand 854 states and 2410 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:40,232 INFO L93 Difference]: Finished difference Result 1033 states and 2758 transitions. [2021-06-12 19:55:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:40,234 INFO L225 Difference]: With dead ends: 1033 [2021-06-12 19:55:40,234 INFO L226 Difference]: Without dead ends: 1033 [2021-06-12 19:55:40,234 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:55:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-06-12 19:55:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 873. [2021-06-12 19:55:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.842889908256881) internal successors, (2479), 872 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2479 transitions. [2021-06-12 19:55:40,243 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2479 transitions. Word has length 17 [2021-06-12 19:55:40,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:40,243 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2479 transitions. [2021-06-12 19:55:40,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2479 transitions. [2021-06-12 19:55:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:40,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:40,244 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:40,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1954,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:40,444 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:40,444 INFO L82 PathProgramCache]: Analyzing trace with hash 601264542, now seen corresponding path program 292 times [2021-06-12 19:55:40,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:40,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222959072] [2021-06-12 19:55:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:40,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222959072] [2021-06-12 19:55:40,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222959072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203889983] [2021-06-12 19:55:40,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:40,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:40,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:40,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:40,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:40,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:40,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:40,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:40,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:40,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:40,699 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:40,700 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:40,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:40,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:40,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203889983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:40,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:40,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:40,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99812565] [2021-06-12 19:55:40,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:40,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:40,763 INFO L87 Difference]: Start difference. First operand 873 states and 2479 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:41,608 INFO L93 Difference]: Finished difference Result 1044 states and 2785 transitions. [2021-06-12 19:55:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:55:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:41,609 INFO L225 Difference]: With dead ends: 1044 [2021-06-12 19:55:41,609 INFO L226 Difference]: Without dead ends: 1034 [2021-06-12 19:55:41,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 19:55:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-12 19:55:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 886. [2021-06-12 19:55:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.8350282485875704) internal successors, (2509), 885 states have internal predecessors, (2509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2509 transitions. [2021-06-12 19:55:41,618 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2509 transitions. Word has length 17 [2021-06-12 19:55:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:41,618 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2509 transitions. [2021-06-12 19:55:41,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2509 transitions. [2021-06-12 19:55:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:41,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:41,619 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:41,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1958 [2021-06-12 19:55:41,820 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1975359048, now seen corresponding path program 293 times [2021-06-12 19:55:41,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:41,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697454215] [2021-06-12 19:55:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:41,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:41,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697454215] [2021-06-12 19:55:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697454215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:41,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93496724] [2021-06-12 19:55:41,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:41,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:55:41,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:41,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:42,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:42,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:42,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:42,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:42,046 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:42,086 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:42,087 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:42,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:42,087 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93496724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:42,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:42,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268537790] [2021-06-12 19:55:42,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:42,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:42,137 INFO L87 Difference]: Start difference. First operand 886 states and 2509 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:42,667 INFO L93 Difference]: Finished difference Result 1034 states and 2759 transitions. [2021-06-12 19:55:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:55:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:42,668 INFO L225 Difference]: With dead ends: 1034 [2021-06-12 19:55:42,668 INFO L226 Difference]: Without dead ends: 1034 [2021-06-12 19:55:42,669 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 494.3ms TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-12 19:55:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 866. [2021-06-12 19:55:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 2.817341040462428) internal successors, (2437), 865 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2437 transitions. [2021-06-12 19:55:42,677 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2437 transitions. Word has length 17 [2021-06-12 19:55:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:42,677 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2437 transitions. [2021-06-12 19:55:42,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2437 transitions. [2021-06-12 19:55:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:42,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:42,678 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:42,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1964 [2021-06-12 19:55:42,878 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash 608994940, now seen corresponding path program 294 times [2021-06-12 19:55:42,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:42,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798978954] [2021-06-12 19:55:42,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:42,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798978954] [2021-06-12 19:55:42,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798978954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:42,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424856796] [2021-06-12 19:55:42,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:42,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:42,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:42,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:43,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:43,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:43,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,128 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:55:43,128 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:43,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:43,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:55:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:43,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424856796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:43,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:43,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:43,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519424306] [2021-06-12 19:55:43,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:43,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:43,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:43,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:43,151 INFO L87 Difference]: Start difference. First operand 866 states and 2437 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:43,926 INFO L93 Difference]: Finished difference Result 1058 states and 2788 transitions. [2021-06-12 19:55:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:55:43,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:43,927 INFO L225 Difference]: With dead ends: 1058 [2021-06-12 19:55:43,927 INFO L226 Difference]: Without dead ends: 1058 [2021-06-12 19:55:43,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 607.6ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:55:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-06-12 19:55:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 864. [2021-06-12 19:55:43,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.8157589803012746) internal successors, (2430), 863 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2430 transitions. [2021-06-12 19:55:43,936 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2430 transitions. Word has length 17 [2021-06-12 19:55:43,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:43,936 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2430 transitions. [2021-06-12 19:55:43,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:43,936 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2430 transitions. [2021-06-12 19:55:43,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:43,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:43,937 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:44,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1968,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:44,137 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash -880410056, now seen corresponding path program 295 times [2021-06-12 19:55:44,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:44,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372133861] [2021-06-12 19:55:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:44,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:44,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372133861] [2021-06-12 19:55:44,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372133861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:44,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669734049] [2021-06-12 19:55:44,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:44,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:44,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:44,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:44,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:44,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:44,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,619 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:55:44,620 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:44,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:44,620 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:55:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:44,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669734049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:44,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:44,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 19:55:44,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279307284] [2021-06-12 19:55:44,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:44,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:44,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:44,645 INFO L87 Difference]: Start difference. First operand 864 states and 2430 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:44,917 INFO L93 Difference]: Finished difference Result 998 states and 2668 transitions. [2021-06-12 19:55:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:55:44,917 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:44,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:44,918 INFO L225 Difference]: With dead ends: 998 [2021-06-12 19:55:44,918 INFO L226 Difference]: Without dead ends: 998 [2021-06-12 19:55:44,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:55:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-12 19:55:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 833. [2021-06-12 19:55:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.7992788461538463) internal successors, (2329), 832 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2329 transitions. [2021-06-12 19:55:44,926 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2329 transitions. Word has length 17 [2021-06-12 19:55:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:44,927 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2329 transitions. [2021-06-12 19:55:44,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2329 transitions. [2021-06-12 19:55:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:44,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:44,927 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:45,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1970 [2021-06-12 19:55:45,128 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:45,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1644528860, now seen corresponding path program 296 times [2021-06-12 19:55:45,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:45,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73719406] [2021-06-12 19:55:45,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:45,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73719406] [2021-06-12 19:55:45,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73719406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463355894] [2021-06-12 19:55:45,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:45,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:45,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:45,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:45,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:45,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,411 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:45,411 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:45,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:45,412 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463355894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:45,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:45,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602893611] [2021-06-12 19:55:45,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:45,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:45,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:45,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:45,433 INFO L87 Difference]: Start difference. First operand 833 states and 2329 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:45,691 INFO L93 Difference]: Finished difference Result 983 states and 2626 transitions. [2021-06-12 19:55:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:45,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:45,692 INFO L225 Difference]: With dead ends: 983 [2021-06-12 19:55:45,692 INFO L226 Difference]: Without dead ends: 983 [2021-06-12 19:55:45,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-06-12 19:55:45,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 873. [2021-06-12 19:55:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.819954128440367) internal successors, (2459), 872 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2459 transitions. [2021-06-12 19:55:45,700 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2459 transitions. Word has length 17 [2021-06-12 19:55:45,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:45,700 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2459 transitions. [2021-06-12 19:55:45,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:45,701 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2459 transitions. [2021-06-12 19:55:45,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:45,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:45,701 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:45,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1972,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:45,902 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:45,902 INFO L82 PathProgramCache]: Analyzing trace with hash -713646272, now seen corresponding path program 297 times [2021-06-12 19:55:45,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:45,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046528192] [2021-06-12 19:55:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:45,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046528192] [2021-06-12 19:55:45,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046528192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:45,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666163743] [2021-06-12 19:55:45,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:46,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:46,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:46,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:46,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:46,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:46,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:46,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:46,206 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:46,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:46,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:46,212 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:46,241 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:46,242 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:46,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:46,243 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:46,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666163743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:46,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:46,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608525285] [2021-06-12 19:55:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:46,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:46,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:46,271 INFO L87 Difference]: Start difference. First operand 873 states and 2459 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:46,705 INFO L93 Difference]: Finished difference Result 964 states and 2578 transitions. [2021-06-12 19:55:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:55:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:46,707 INFO L225 Difference]: With dead ends: 964 [2021-06-12 19:55:46,707 INFO L226 Difference]: Without dead ends: 956 [2021-06-12 19:55:46,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 456.2ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:55:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-12 19:55:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 879. [2021-06-12 19:55:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.8086560364464694) internal successors, (2466), 878 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2466 transitions. [2021-06-12 19:55:46,715 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2466 transitions. Word has length 17 [2021-06-12 19:55:46,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:46,715 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2466 transitions. [2021-06-12 19:55:46,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2466 transitions. [2021-06-12 19:55:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:46,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:46,716 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:46,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1975 [2021-06-12 19:55:46,917 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1489416322, now seen corresponding path program 298 times [2021-06-12 19:55:46,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:46,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878988842] [2021-06-12 19:55:46,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:46,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878988842] [2021-06-12 19:55:46,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878988842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:46,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293946551] [2021-06-12 19:55:46,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:47,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:47,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:47,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:47,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:47,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:47,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:47,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,208 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:47,208 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:47,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:47,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:47,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293946551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:47,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:47,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:47,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138518676] [2021-06-12 19:55:47,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:47,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:47,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:47,230 INFO L87 Difference]: Start difference. First operand 879 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:48,121 INFO L93 Difference]: Finished difference Result 1061 states and 2767 transitions. [2021-06-12 19:55:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:55:48,122 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:48,123 INFO L225 Difference]: With dead ends: 1061 [2021-06-12 19:55:48,123 INFO L226 Difference]: Without dead ends: 1061 [2021-06-12 19:55:48,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 796.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1734, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:55:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-12 19:55:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 874. [2021-06-12 19:55:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 2.8178694158075603) internal successors, (2460), 873 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2460 transitions. [2021-06-12 19:55:48,132 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2460 transitions. Word has length 17 [2021-06-12 19:55:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:48,132 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2460 transitions. [2021-06-12 19:55:48,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:48,132 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2460 transitions. [2021-06-12 19:55:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:48,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:48,133 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:48,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1982,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:48,333 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1251501850, now seen corresponding path program 299 times [2021-06-12 19:55:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:48,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644502784] [2021-06-12 19:55:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:48,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644502784] [2021-06-12 19:55:48,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644502784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:48,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893517918] [2021-06-12 19:55:48,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:48,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:55:48,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:48,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:48,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:48,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:48,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:48,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:48,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:48,649 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:48,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:48,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:48,681 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:48,681 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:48,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:48,682 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:48,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893517918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:48,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:48,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:48,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501821669] [2021-06-12 19:55:48,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:48,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:48,710 INFO L87 Difference]: Start difference. First operand 874 states and 2460 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:49,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:49,359 INFO L93 Difference]: Finished difference Result 969 states and 2587 transitions. [2021-06-12 19:55:49,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:55:49,359 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:49,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:49,360 INFO L225 Difference]: With dead ends: 969 [2021-06-12 19:55:49,360 INFO L226 Difference]: Without dead ends: 963 [2021-06-12 19:55:49,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 578.4ms TimeCoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:55:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-06-12 19:55:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 876. [2021-06-12 19:55:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8125714285714287) internal successors, (2461), 875 states have internal predecessors, (2461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2461 transitions. [2021-06-12 19:55:49,369 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2461 transitions. Word has length 17 [2021-06-12 19:55:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:49,369 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2461 transitions. [2021-06-12 19:55:49,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2461 transitions. [2021-06-12 19:55:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:49,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:49,370 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:49,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1985 [2021-06-12 19:55:49,570 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:49,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1729058660, now seen corresponding path program 300 times [2021-06-12 19:55:49,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:49,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357987440] [2021-06-12 19:55:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:49,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:49,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357987440] [2021-06-12 19:55:49,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357987440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:49,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221968981] [2021-06-12 19:55:49,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:49,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:49,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:49,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:49,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:49,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:49,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:49,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:49,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,865 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:49,866 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:49,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:49,867 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:49,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221968981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:49,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:49,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:49,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956911186] [2021-06-12 19:55:49,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:49,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:49,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:49,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:49,895 INFO L87 Difference]: Start difference. First operand 876 states and 2461 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:50,739 INFO L93 Difference]: Finished difference Result 1058 states and 2767 transitions. [2021-06-12 19:55:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:55:50,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:50,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:50,740 INFO L225 Difference]: With dead ends: 1058 [2021-06-12 19:55:50,740 INFO L226 Difference]: Without dead ends: 1056 [2021-06-12 19:55:50,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 660.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:55:50,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-12 19:55:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 875. [2021-06-12 19:55:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.8215102974828374) internal successors, (2466), 874 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:50,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2466 transitions. [2021-06-12 19:55:50,753 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2466 transitions. Word has length 17 [2021-06-12 19:55:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:50,753 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2466 transitions. [2021-06-12 19:55:50,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2466 transitions. [2021-06-12 19:55:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:50,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:50,754 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:50,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1992 [2021-06-12 19:55:50,954 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:50,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash 809357952, now seen corresponding path program 301 times [2021-06-12 19:55:50,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:50,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580206424] [2021-06-12 19:55:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:51,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:51,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580206424] [2021-06-12 19:55:51,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580206424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:51,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001249771] [2021-06-12 19:55:51,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:51,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:51,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:51,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:51,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:51,252 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:51,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:51,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:51,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:51,262 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:51,291 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:51,292 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:51,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:51,293 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:51,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001249771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:51,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:51,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:51,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43241882] [2021-06-12 19:55:51,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:51,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:51,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:51,321 INFO L87 Difference]: Start difference. First operand 875 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:51,953 INFO L93 Difference]: Finished difference Result 944 states and 2560 transitions. [2021-06-12 19:55:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:55:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:51,955 INFO L225 Difference]: With dead ends: 944 [2021-06-12 19:55:51,955 INFO L226 Difference]: Without dead ends: 940 [2021-06-12 19:55:51,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-12 19:55:51,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 876. [2021-06-12 19:55:51,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.816) internal successors, (2464), 875 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2464 transitions. [2021-06-12 19:55:51,964 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2464 transitions. Word has length 17 [2021-06-12 19:55:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:51,964 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2464 transitions. [2021-06-12 19:55:51,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2464 transitions. [2021-06-12 19:55:51,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:51,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:51,965 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:52,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1995 [2021-06-12 19:55:52,165 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:52,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1736789058, now seen corresponding path program 302 times [2021-06-12 19:55:52,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:52,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741507226] [2021-06-12 19:55:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:52,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741507226] [2021-06-12 19:55:52,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741507226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:52,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359409037] [2021-06-12 19:55:52,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:52,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:52,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:52,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:52,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:52,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:52,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:52,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:52,451 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:52,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:52,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:52,488 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:52,488 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:52,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:52,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:52,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359409037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:52,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:52,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:52,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473376040] [2021-06-12 19:55:52,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:52,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:52,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:52,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:52,546 INFO L87 Difference]: Start difference. First operand 876 states and 2464 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:53,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:53,149 INFO L93 Difference]: Finished difference Result 1040 states and 2679 transitions. [2021-06-12 19:55:53,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:55:53,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:53,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:53,151 INFO L225 Difference]: With dead ends: 1040 [2021-06-12 19:55:53,151 INFO L226 Difference]: Without dead ends: 1038 [2021-06-12 19:55:53,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 646.2ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:53,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-12 19:55:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 835. [2021-06-12 19:55:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 2.7841726618705036) internal successors, (2322), 834 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2322 transitions. [2021-06-12 19:55:53,160 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2322 transitions. Word has length 17 [2021-06-12 19:55:53,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:53,160 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2322 transitions. [2021-06-12 19:55:53,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2322 transitions. [2021-06-12 19:55:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:53,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:53,161 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:53,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2002 [2021-06-12 19:55:53,362 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:53,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1756562010, now seen corresponding path program 303 times [2021-06-12 19:55:53,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:53,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558005655] [2021-06-12 19:55:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:53,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:53,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558005655] [2021-06-12 19:55:53,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558005655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120586421] [2021-06-12 19:55:53,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:53,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:55:53,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:53,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:53,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:53,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:53,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:53,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:53,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:53,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:53,649 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:53,649 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:53,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:53,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:53,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:53,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120586421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:53,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:53,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:53,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058527012] [2021-06-12 19:55:53,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:53,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:53,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:53,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:53,720 INFO L87 Difference]: Start difference. First operand 835 states and 2322 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:54,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:54,367 INFO L93 Difference]: Finished difference Result 924 states and 2467 transitions. [2021-06-12 19:55:54,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:55:54,368 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:54,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:54,369 INFO L225 Difference]: With dead ends: 924 [2021-06-12 19:55:54,369 INFO L226 Difference]: Without dead ends: 920 [2021-06-12 19:55:54,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:55:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-12 19:55:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 840. [2021-06-12 19:55:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 2.7842669845053636) internal successors, (2336), 839 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2336 transitions. [2021-06-12 19:55:54,377 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2336 transitions. Word has length 17 [2021-06-12 19:55:54,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:54,377 INFO L482 AbstractCegarLoop]: Abstraction has 840 states and 2336 transitions. [2021-06-12 19:55:54,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:54,377 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2336 transitions. [2021-06-12 19:55:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:54,378 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:54,378 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:54,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2006,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:54,579 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:54,579 INFO L82 PathProgramCache]: Analyzing trace with hash -38218304, now seen corresponding path program 304 times [2021-06-12 19:55:54,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:54,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793674376] [2021-06-12 19:55:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:54,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793674376] [2021-06-12 19:55:54,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793674376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210916272] [2021-06-12 19:55:54,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:54,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:55:54,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:54,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:54,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:54,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:54,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:54,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:54,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:54,836 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:54,868 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:54,868 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:54,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:54,869 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:54,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210916272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:54,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:54,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:55:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027690856] [2021-06-12 19:55:54,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:55:54,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:55:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:55:54,921 INFO L87 Difference]: Start difference. First operand 840 states and 2336 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:55,264 INFO L93 Difference]: Finished difference Result 915 states and 2451 transitions. [2021-06-12 19:55:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:55:55,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:55,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:55,265 INFO L225 Difference]: With dead ends: 915 [2021-06-12 19:55:55,265 INFO L226 Difference]: Without dead ends: 915 [2021-06-12 19:55:55,265 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:55:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-12 19:55:55,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 819. [2021-06-12 19:55:55,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.7811735941320292) internal successors, (2275), 818 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2275 transitions. [2021-06-12 19:55:55,273 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2275 transitions. Word has length 17 [2021-06-12 19:55:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:55,273 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2275 transitions. [2021-06-12 19:55:55,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2275 transitions. [2021-06-12 19:55:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:55,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:55,274 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:55,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-06-12 19:55:55,474 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2044748640, now seen corresponding path program 305 times [2021-06-12 19:55:55,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:55,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706285423] [2021-06-12 19:55:55,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:55:55,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706285423] [2021-06-12 19:55:55,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706285423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389760088] [2021-06-12 19:55:55,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:55,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:55:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:55,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:55,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:55,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:55,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:55,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:55,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:55,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:55,750 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:55:55,750 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:55,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:55:55,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:55:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:55,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389760088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:55,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:55,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:55:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810293548] [2021-06-12 19:55:55,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:55,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:55,819 INFO L87 Difference]: Start difference. First operand 819 states and 2275 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:56,382 INFO L93 Difference]: Finished difference Result 851 states and 2323 transitions. [2021-06-12 19:55:56,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:56,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:56,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:56,383 INFO L225 Difference]: With dead ends: 851 [2021-06-12 19:55:56,383 INFO L226 Difference]: Without dead ends: 847 [2021-06-12 19:55:56,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:55:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-12 19:55:56,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 812. [2021-06-12 19:55:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 2.780517879161529) internal successors, (2255), 811 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2255 transitions. [2021-06-12 19:55:56,391 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2255 transitions. Word has length 17 [2021-06-12 19:55:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:56,391 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2255 transitions. [2021-06-12 19:55:56,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2255 transitions. [2021-06-12 19:55:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:56,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:56,392 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:56,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2016 [2021-06-12 19:55:56,593 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:56,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:56,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1683195326, now seen corresponding path program 306 times [2021-06-12 19:55:56,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:56,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081241851] [2021-06-12 19:55:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:56,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:56,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081241851] [2021-06-12 19:55:56,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081241851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481968172] [2021-06-12 19:55:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:56,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:55:56,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:56,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:56,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:56,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:56,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:56,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:56,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,853 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:56,853 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:56,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:56,853 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:56,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481968172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:56,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:56,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:55:56,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57679092] [2021-06-12 19:55:56,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:56,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:56,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:56,873 INFO L87 Difference]: Start difference. First operand 812 states and 2255 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:57,166 INFO L93 Difference]: Finished difference Result 940 states and 2502 transitions. [2021-06-12 19:55:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:55:57,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:57,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:57,167 INFO L225 Difference]: With dead ends: 940 [2021-06-12 19:55:57,168 INFO L226 Difference]: Without dead ends: 940 [2021-06-12 19:55:57,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-06-12 19:55:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 830. [2021-06-12 19:55:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.7889022919179736) internal successors, (2312), 829 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2312 transitions. [2021-06-12 19:55:57,176 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2312 transitions. Word has length 17 [2021-06-12 19:55:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:57,176 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2312 transitions. [2021-06-12 19:55:57,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2312 transitions. [2021-06-12 19:55:57,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:57,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:57,177 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:57,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2021,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:57,377 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:57,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:57,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1057722846, now seen corresponding path program 307 times [2021-06-12 19:55:57,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:57,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007517369] [2021-06-12 19:55:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:57,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007517369] [2021-06-12 19:55:57,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007517369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707491635] [2021-06-12 19:55:57,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:57,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:57,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:57,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:57,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:57,642 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:57,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:57,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:57,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:57,677 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:57,677 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:57,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:57,678 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:57,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:57,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707491635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:57,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:57,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:55:57,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072420615] [2021-06-12 19:55:57,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:57,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:57,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:57,705 INFO L87 Difference]: Start difference. First operand 830 states and 2312 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:58,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:58,132 INFO L93 Difference]: Finished difference Result 894 states and 2398 transitions. [2021-06-12 19:55:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:55:58,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:58,133 INFO L225 Difference]: With dead ends: 894 [2021-06-12 19:55:58,133 INFO L226 Difference]: Without dead ends: 888 [2021-06-12 19:55:58,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:55:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-06-12 19:55:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 832. [2021-06-12 19:55:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.782190132370638) internal successors, (2312), 831 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2312 transitions. [2021-06-12 19:55:58,141 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2312 transitions. Word has length 17 [2021-06-12 19:55:58,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:58,141 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2312 transitions. [2021-06-12 19:55:58,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:58,141 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2312 transitions. [2021-06-12 19:55:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:58,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:58,142 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:58,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-06-12 19:55:58,342 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:58,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:58,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1922837664, now seen corresponding path program 308 times [2021-06-12 19:55:58,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:58,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65268573] [2021-06-12 19:55:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:58,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:58,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65268573] [2021-06-12 19:55:58,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65268573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175191052] [2021-06-12 19:55:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:58,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:55:58,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:58,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:58,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:58,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:58,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:58,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:55:58,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,624 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:55:58,625 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:58,625 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:55:58,625 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:55:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:58,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175191052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:58,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:58,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:55:58,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732995969] [2021-06-12 19:55:58,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:58,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:58,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:58,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:58,647 INFO L87 Difference]: Start difference. First operand 832 states and 2312 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:55:59,192 INFO L93 Difference]: Finished difference Result 951 states and 2519 transitions. [2021-06-12 19:55:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:55:59,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:55:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:55:59,193 INFO L225 Difference]: With dead ends: 951 [2021-06-12 19:55:59,193 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 19:55:59,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:55:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 19:55:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 827. [2021-06-12 19:55:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.7869249394673123) internal successors, (2302), 826 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2302 transitions. [2021-06-12 19:55:59,201 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2302 transitions. Word has length 17 [2021-06-12 19:55:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:55:59,201 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2302 transitions. [2021-06-12 19:55:59,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:55:59,201 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2302 transitions. [2021-06-12 19:55:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:55:59,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:55:59,202 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:55:59,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2031,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:59,403 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:55:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:55:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1003136956, now seen corresponding path program 309 times [2021-06-12 19:55:59,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:55:59,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829741242] [2021-06-12 19:55:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:55:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:55:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:59,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:55:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829741242] [2021-06-12 19:55:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829741242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:59,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385469976] [2021-06-12 19:55:59,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:55:59,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:55:59,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:55:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:55:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:55:59,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:55:59,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:59,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:55:59,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:59,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:55:59,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:55:59,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:55:59,689 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:55:59,718 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:55:59,718 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:55:59,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:55:59,719 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:55:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:55:59,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385469976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:55:59,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:55:59,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:55:59,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615355027] [2021-06-12 19:55:59,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:55:59,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:55:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:55:59,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:55:59,746 INFO L87 Difference]: Start difference. First operand 827 states and 2302 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:00,238 INFO L93 Difference]: Finished difference Result 886 states and 2387 transitions. [2021-06-12 19:56:00,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:56:00,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:00,240 INFO L225 Difference]: With dead ends: 886 [2021-06-12 19:56:00,240 INFO L226 Difference]: Without dead ends: 882 [2021-06-12 19:56:00,240 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-12 19:56:00,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 828. [2021-06-12 19:56:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.7835550181378474) internal successors, (2302), 827 states have internal predecessors, (2302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2302 transitions. [2021-06-12 19:56:00,248 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2302 transitions. Word has length 17 [2021-06-12 19:56:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:00,248 INFO L482 AbstractCegarLoop]: Abstraction has 828 states and 2302 transitions. [2021-06-12 19:56:00,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2302 transitions. [2021-06-12 19:56:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:00,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:00,249 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:00,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2034 [2021-06-12 19:56:00,461 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:00,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:00,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1930568062, now seen corresponding path program 310 times [2021-06-12 19:56:00,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:00,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35293626] [2021-06-12 19:56:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:00,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35293626] [2021-06-12 19:56:00,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35293626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222951150] [2021-06-12 19:56:00,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:00,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:00,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:00,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:00,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:00,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:00,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:00,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:00,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:00,715 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:00,716 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:00,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:00,716 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:00,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:00,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222951150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:00,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:00,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:56:00,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135236151] [2021-06-12 19:56:00,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:00,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:00,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:00,765 INFO L87 Difference]: Start difference. First operand 828 states and 2302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:01,166 INFO L93 Difference]: Finished difference Result 982 states and 2548 transitions. [2021-06-12 19:56:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:56:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:01,167 INFO L225 Difference]: With dead ends: 982 [2021-06-12 19:56:01,167 INFO L226 Difference]: Without dead ends: 982 [2021-06-12 19:56:01,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:56:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-12 19:56:01,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 829. [2021-06-12 19:56:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 2.783816425120773) internal successors, (2305), 828 states have internal predecessors, (2305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2305 transitions. [2021-06-12 19:56:01,175 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2305 transitions. Word has length 17 [2021-06-12 19:56:01,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:01,175 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2305 transitions. [2021-06-12 19:56:01,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2305 transitions. [2021-06-12 19:56:01,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:01,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:01,176 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:01,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:01,377 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:01,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:01,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1562783006, now seen corresponding path program 311 times [2021-06-12 19:56:01,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:01,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272243431] [2021-06-12 19:56:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:01,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:01,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272243431] [2021-06-12 19:56:01,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272243431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926638721] [2021-06-12 19:56:01,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:01,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:01,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:01,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:01,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:01,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:01,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:01,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:01,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:01,612 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:01,646 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:01,646 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:01,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:01,646 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:01,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926638721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:01,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:01,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:56:01,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553737695] [2021-06-12 19:56:01,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:01,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:01,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:01,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:01,711 INFO L87 Difference]: Start difference. First operand 829 states and 2305 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:02,313 INFO L93 Difference]: Finished difference Result 927 states and 2463 transitions. [2021-06-12 19:56:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:56:02,313 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:02,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:02,314 INFO L225 Difference]: With dead ends: 927 [2021-06-12 19:56:02,314 INFO L226 Difference]: Without dead ends: 923 [2021-06-12 19:56:02,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 549.5ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:56:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-12 19:56:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 833. [2021-06-12 19:56:02,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 2.784855769230769) internal successors, (2317), 832 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2317 transitions. [2021-06-12 19:56:02,322 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2317 transitions. Word has length 17 [2021-06-12 19:56:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:02,322 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2317 transitions. [2021-06-12 19:56:02,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2317 transitions. [2021-06-12 19:56:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:02,323 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:02,323 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:02,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2045 [2021-06-12 19:56:02,523 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:02,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:02,524 INFO L82 PathProgramCache]: Analyzing trace with hash 155560700, now seen corresponding path program 312 times [2021-06-12 19:56:02,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:02,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203597381] [2021-06-12 19:56:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:02,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203597381] [2021-06-12 19:56:02,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203597381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069135196] [2021-06-12 19:56:02,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:02,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:02,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:02,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:02,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:02,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:02,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:02,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:02,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:02,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:02,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:02,781 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:02,781 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:02,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:02,782 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069135196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:02,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:02,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-12 19:56:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408016633] [2021-06-12 19:56:02,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:56:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:56:02,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:56:02,832 INFO L87 Difference]: Start difference. First operand 833 states and 2317 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:03,217 INFO L93 Difference]: Finished difference Result 915 states and 2448 transitions. [2021-06-12 19:56:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:56:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:03,218 INFO L225 Difference]: With dead ends: 915 [2021-06-12 19:56:03,218 INFO L226 Difference]: Without dead ends: 915 [2021-06-12 19:56:03,218 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 363.7ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:56:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-06-12 19:56:03,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 827. [2021-06-12 19:56:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 2.777239709443099) internal successors, (2294), 826 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2294 transitions. [2021-06-12 19:56:03,226 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2294 transitions. Word has length 17 [2021-06-12 19:56:03,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:03,226 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2294 transitions. [2021-06-12 19:56:03,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:03,226 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2294 transitions. [2021-06-12 19:56:03,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:03,227 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:03,227 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:03,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2051,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,428 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:03,428 INFO L82 PathProgramCache]: Analyzing trace with hash 316207332, now seen corresponding path program 313 times [2021-06-12 19:56:03,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:03,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660799084] [2021-06-12 19:56:03,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:03,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660799084] [2021-06-12 19:56:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660799084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275479163] [2021-06-12 19:56:03,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:03,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:03,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:03,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:03,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:03,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:03,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:03,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:03,655 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:03,655 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:03,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:03,656 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:03,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275479163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:03,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:03,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:03,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731681287] [2021-06-12 19:56:03,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:03,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:03,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:03,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:03,724 INFO L87 Difference]: Start difference. First operand 827 states and 2294 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:04,115 INFO L93 Difference]: Finished difference Result 861 states and 2351 transitions. [2021-06-12 19:56:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:56:04,115 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:04,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:04,116 INFO L225 Difference]: With dead ends: 861 [2021-06-12 19:56:04,116 INFO L226 Difference]: Without dead ends: 857 [2021-06-12 19:56:04,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:56:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-06-12 19:56:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 823. [2021-06-12 19:56:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 2.778588807785888) internal successors, (2284), 822 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2284 transitions. [2021-06-12 19:56:04,123 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2284 transitions. Word has length 17 [2021-06-12 19:56:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:04,123 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2284 transitions. [2021-06-12 19:56:04,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2284 transitions. [2021-06-12 19:56:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:04,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:04,124 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:04,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:04,324 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1950236700, now seen corresponding path program 314 times [2021-06-12 19:56:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:04,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162053333] [2021-06-12 19:56:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:04,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162053333] [2021-06-12 19:56:04,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162053333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880884274] [2021-06-12 19:56:04,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:04,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:04,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:04,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:04,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:04,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:04,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:04,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,555 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:56:04,555 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:04,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:04,556 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:56:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:04,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880884274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:04,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:04,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:04,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603689424] [2021-06-12 19:56:04,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:04,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:04,575 INFO L87 Difference]: Start difference. First operand 823 states and 2284 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:04,812 INFO L93 Difference]: Finished difference Result 932 states and 2492 transitions. [2021-06-12 19:56:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:56:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:04,813 INFO L225 Difference]: With dead ends: 932 [2021-06-12 19:56:04,813 INFO L226 Difference]: Without dead ends: 932 [2021-06-12 19:56:04,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-06-12 19:56:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 838. [2021-06-12 19:56:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.7897252090800477) internal successors, (2335), 837 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2335 transitions. [2021-06-12 19:56:04,821 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2335 transitions. Word has length 17 [2021-06-12 19:56:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:04,821 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2335 transitions. [2021-06-12 19:56:04,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2335 transitions. [2021-06-12 19:56:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:04,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:04,822 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:05,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2060 [2021-06-12 19:56:05,024 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:05,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:05,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1425029888, now seen corresponding path program 315 times [2021-06-12 19:56:05,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:05,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82096959] [2021-06-12 19:56:05,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:05,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:05,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82096959] [2021-06-12 19:56:05,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82096959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607292059] [2021-06-12 19:56:05,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:05,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:56:05,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:05,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:05,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:05,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:05,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:56:05,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:56:05,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:56:05,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:56:05,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:05,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:05,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:05,303 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:56:05,303 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:05,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:56:05,304 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:56:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:05,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607292059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:05,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:05,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907546510] [2021-06-12 19:56:05,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:05,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:05,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:05,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:05,330 INFO L87 Difference]: Start difference. First operand 838 states and 2335 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:05,702 INFO L93 Difference]: Finished difference Result 896 states and 2417 transitions. [2021-06-12 19:56:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:56:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:05,704 INFO L225 Difference]: With dead ends: 896 [2021-06-12 19:56:05,704 INFO L226 Difference]: Without dead ends: 892 [2021-06-12 19:56:05,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:56:05,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-06-12 19:56:05,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 838. [2021-06-12 19:56:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 2.7873357228195936) internal successors, (2333), 837 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2333 transitions. [2021-06-12 19:56:05,712 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2333 transitions. Word has length 17 [2021-06-12 19:56:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:05,712 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2333 transitions. [2021-06-12 19:56:05,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2333 transitions. [2021-06-12 19:56:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:05,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:05,713 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:05,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2063,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:05,913 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:05,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:05,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1942506302, now seen corresponding path program 316 times [2021-06-12 19:56:05,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:05,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680772528] [2021-06-12 19:56:05,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:05,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:05,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680772528] [2021-06-12 19:56:05,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680772528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:05,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451998043] [2021-06-12 19:56:05,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:06,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:06,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:06,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:06,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:06,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:06,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:06,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:06,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:06,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,153 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:06,153 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:06,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:06,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:06,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451998043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:06,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:06,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:06,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140629347] [2021-06-12 19:56:06,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:06,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:06,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:06,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:06,201 INFO L87 Difference]: Start difference. First operand 838 states and 2333 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:06,504 INFO L93 Difference]: Finished difference Result 949 states and 2506 transitions. [2021-06-12 19:56:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:06,505 INFO L225 Difference]: With dead ends: 949 [2021-06-12 19:56:06,505 INFO L226 Difference]: Without dead ends: 948 [2021-06-12 19:56:06,505 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-06-12 19:56:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 839. [2021-06-12 19:56:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 2.788782816229117) internal successors, (2337), 838 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2337 transitions. [2021-06-12 19:56:06,514 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2337 transitions. Word has length 17 [2021-06-12 19:56:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:06,514 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2337 transitions. [2021-06-12 19:56:06,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2337 transitions. [2021-06-12 19:56:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:06,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:06,515 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:06,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2070,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:06,715 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:06,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:06,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1140890074, now seen corresponding path program 317 times [2021-06-12 19:56:06,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:06,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235737767] [2021-06-12 19:56:06,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:06,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235737767] [2021-06-12 19:56:06,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235737767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:06,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467357049] [2021-06-12 19:56:06,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:06,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:56:06,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:06,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:06,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:06,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:06,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:06,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:06,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:06,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:06,920 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:06,953 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:06,953 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:06,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:06,954 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:07,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467357049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:07,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:07,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:07,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604874811] [2021-06-12 19:56:07,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:07,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:07,015 INFO L87 Difference]: Start difference. First operand 839 states and 2337 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:07,511 INFO L93 Difference]: Finished difference Result 925 states and 2478 transitions. [2021-06-12 19:56:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:56:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:07,513 INFO L225 Difference]: With dead ends: 925 [2021-06-12 19:56:07,513 INFO L226 Difference]: Without dead ends: 921 [2021-06-12 19:56:07,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:07,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-06-12 19:56:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 844. [2021-06-12 19:56:07,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.792408066429419) internal successors, (2354), 843 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2354 transitions. [2021-06-12 19:56:07,521 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2354 transitions. Word has length 17 [2021-06-12 19:56:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:07,521 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2354 transitions. [2021-06-12 19:56:07,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2354 transitions. [2021-06-12 19:56:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:07,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:07,522 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:07,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:07,723 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash 577453632, now seen corresponding path program 318 times [2021-06-12 19:56:07,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:07,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575535725] [2021-06-12 19:56:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:07,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:07,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575535725] [2021-06-12 19:56:07,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575535725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:07,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207633676] [2021-06-12 19:56:07,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:07,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:07,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:07,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:07,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:07,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:07,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:07,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:07,968 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:07,968 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:07,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:07,969 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207633676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:08,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:08,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57348339] [2021-06-12 19:56:08,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:08,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:08,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:08,018 INFO L87 Difference]: Start difference. First operand 844 states and 2354 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:08,359 INFO L93 Difference]: Finished difference Result 912 states and 2456 transitions. [2021-06-12 19:56:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:08,361 INFO L225 Difference]: With dead ends: 912 [2021-06-12 19:56:08,361 INFO L226 Difference]: Without dead ends: 912 [2021-06-12 19:56:08,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:56:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-06-12 19:56:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 826. [2021-06-12 19:56:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.7793939393939393) internal successors, (2293), 825 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:08,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2293 transitions. [2021-06-12 19:56:08,369 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2293 transitions. Word has length 17 [2021-06-12 19:56:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:08,369 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2293 transitions. [2021-06-12 19:56:08,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2293 transitions. [2021-06-12 19:56:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:08,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:08,370 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:08,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2080,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:08,570 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1824390112, now seen corresponding path program 319 times [2021-06-12 19:56:08,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:08,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174874578] [2021-06-12 19:56:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:08,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174874578] [2021-06-12 19:56:08,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174874578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173600318] [2021-06-12 19:56:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:08,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:08,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:08,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:08,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:08,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:08,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:08,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:08,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:08,809 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:08,809 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:08,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:08,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:08,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173600318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:08,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:08,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:08,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122472355] [2021-06-12 19:56:08,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:08,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:08,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:08,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:08,876 INFO L87 Difference]: Start difference. First operand 826 states and 2293 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:09,138 INFO L93 Difference]: Finished difference Result 904 states and 2426 transitions. [2021-06-12 19:56:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:56:09,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:09,139 INFO L225 Difference]: With dead ends: 904 [2021-06-12 19:56:09,139 INFO L226 Difference]: Without dead ends: 900 [2021-06-12 19:56:09,139 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:09,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-06-12 19:56:09,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 831. [2021-06-12 19:56:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.7819277108433735) internal successors, (2309), 830 states have internal predecessors, (2309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2309 transitions. [2021-06-12 19:56:09,147 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2309 transitions. Word has length 17 [2021-06-12 19:56:09,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:09,147 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2309 transitions. [2021-06-12 19:56:09,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2309 transitions. [2021-06-12 19:56:09,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:09,148 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:09,148 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:09,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2084 [2021-06-12 19:56:09,349 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:09,349 INFO L82 PathProgramCache]: Analyzing trace with hash -95342778, now seen corresponding path program 320 times [2021-06-12 19:56:09,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:09,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642916770] [2021-06-12 19:56:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:56:09,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:09,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642916770] [2021-06-12 19:56:09,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642916770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:09,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238615936] [2021-06-12 19:56:09,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:09,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:09,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:09,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:09,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:09,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:56:09,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:56:09,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:56:09,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:56:09,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:09,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:09,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:09,595 INFO L628 ElimStorePlain]: treesize reduction 43, result has 40.3 percent of original size [2021-06-12 19:56:09,595 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:09,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:56:09,595 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:56:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:09,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238615936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:09,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:09,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-12 19:56:09,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164320646] [2021-06-12 19:56:09,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:56:09,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:09,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:56:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:56:09,625 INFO L87 Difference]: Start difference. First operand 831 states and 2309 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:09,871 INFO L93 Difference]: Finished difference Result 870 states and 2366 transitions. [2021-06-12 19:56:09,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:56:09,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:09,872 INFO L225 Difference]: With dead ends: 870 [2021-06-12 19:56:09,873 INFO L226 Difference]: Without dead ends: 862 [2021-06-12 19:56:09,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-06-12 19:56:09,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 830. [2021-06-12 19:56:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.778045838359469) internal successors, (2303), 829 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2303 transitions. [2021-06-12 19:56:09,881 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2303 transitions. Word has length 17 [2021-06-12 19:56:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:09,881 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2303 transitions. [2021-06-12 19:56:09,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2303 transitions. [2021-06-12 19:56:09,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:09,881 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:09,882 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:10,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2089 [2021-06-12 19:56:10,082 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:10,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:10,082 INFO L82 PathProgramCache]: Analyzing trace with hash 842049790, now seen corresponding path program 321 times [2021-06-12 19:56:10,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:10,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857317810] [2021-06-12 19:56:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:10,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857317810] [2021-06-12 19:56:10,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857317810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:10,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404028546] [2021-06-12 19:56:10,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:10,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:10,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:10,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:10,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:10,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:10,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:10,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:10,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:10,396 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:10,396 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:10,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:10,397 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:10,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404028546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:10,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:10,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:10,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157642242] [2021-06-12 19:56:10,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:10,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:10,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:10,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:10,450 INFO L87 Difference]: Start difference. First operand 830 states and 2303 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:10,784 INFO L93 Difference]: Finished difference Result 1009 states and 2637 transitions. [2021-06-12 19:56:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:10,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:10,786 INFO L225 Difference]: With dead ends: 1009 [2021-06-12 19:56:10,786 INFO L226 Difference]: Without dead ends: 1009 [2021-06-12 19:56:10,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:56:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-06-12 19:56:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 854. [2021-06-12 19:56:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.8007033997655335) internal successors, (2389), 853 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2389 transitions. [2021-06-12 19:56:10,794 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2389 transitions. Word has length 17 [2021-06-12 19:56:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:10,794 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2389 transitions. [2021-06-12 19:56:10,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2389 transitions. [2021-06-12 19:56:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:10,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:10,795 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:10,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2093 [2021-06-12 19:56:10,996 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:10,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1643666018, now seen corresponding path program 322 times [2021-06-12 19:56:10,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:10,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324428840] [2021-06-12 19:56:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:11,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:11,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324428840] [2021-06-12 19:56:11,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324428840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113126387] [2021-06-12 19:56:11,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:11,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:11,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:11,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:11,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:11,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:11,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:11,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:11,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:11,255 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:11,288 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:11,289 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:11,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:11,289 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113126387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439206436] [2021-06-12 19:56:11,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:11,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:11,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:11,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:11,356 INFO L87 Difference]: Start difference. First operand 854 states and 2389 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:12,260 INFO L93 Difference]: Finished difference Result 1042 states and 2727 transitions. [2021-06-12 19:56:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:56:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:12,261 INFO L225 Difference]: With dead ends: 1042 [2021-06-12 19:56:12,261 INFO L226 Difference]: Without dead ends: 1031 [2021-06-12 19:56:12,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 811.4ms TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:56:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-06-12 19:56:12,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 876. [2021-06-12 19:56:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8182857142857145) internal successors, (2466), 875 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:12,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2466 transitions. [2021-06-12 19:56:12,271 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2466 transitions. Word has length 17 [2021-06-12 19:56:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:12,271 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2466 transitions. [2021-06-12 19:56:12,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2466 transitions. [2021-06-12 19:56:12,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:12,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:12,272 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:12,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2097,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:12,472 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:12,472 INFO L82 PathProgramCache]: Analyzing trace with hash -932957572, now seen corresponding path program 323 times [2021-06-12 19:56:12,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:12,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818357418] [2021-06-12 19:56:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:12,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818357418] [2021-06-12 19:56:12,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818357418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310026196] [2021-06-12 19:56:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:12,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:12,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:12,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:12,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:12,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:56:12,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:12,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:12,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:12,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:12,774 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:56:12,774 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:12,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:12,775 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:56:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:12,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310026196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:12,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:12,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:12,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606616212] [2021-06-12 19:56:12,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:12,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:12,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:12,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:12,823 INFO L87 Difference]: Start difference. First operand 876 states and 2466 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:13,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:13,300 INFO L93 Difference]: Finished difference Result 1018 states and 2686 transitions. [2021-06-12 19:56:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:56:13,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:13,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:13,301 INFO L225 Difference]: With dead ends: 1018 [2021-06-12 19:56:13,301 INFO L226 Difference]: Without dead ends: 1018 [2021-06-12 19:56:13,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 469.7ms TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:56:13,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-06-12 19:56:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 876. [2021-06-12 19:56:13,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.8034285714285714) internal successors, (2453), 875 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2453 transitions. [2021-06-12 19:56:13,310 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2453 transitions. Word has length 17 [2021-06-12 19:56:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:13,310 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2453 transitions. [2021-06-12 19:56:13,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2453 transitions. [2021-06-12 19:56:13,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:13,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:13,311 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:13,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2103,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:13,511 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1651396416, now seen corresponding path program 324 times [2021-06-12 19:56:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:13,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500262011] [2021-06-12 19:56:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:13,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500262011] [2021-06-12 19:56:13,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500262011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632612836] [2021-06-12 19:56:13,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:13,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:13,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:13,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:13,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:13,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:13,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:13,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,777 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:56:13,777 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:13,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:13,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:56:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:13,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632612836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:13,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:13,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:13,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715559471] [2021-06-12 19:56:13,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:13,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:13,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:13,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:13,802 INFO L87 Difference]: Start difference. First operand 876 states and 2453 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:14,584 INFO L93 Difference]: Finished difference Result 1064 states and 2766 transitions. [2021-06-12 19:56:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:56:14,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:14,585 INFO L225 Difference]: With dead ends: 1064 [2021-06-12 19:56:14,585 INFO L226 Difference]: Without dead ends: 1064 [2021-06-12 19:56:14,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:56:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-12 19:56:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 873. [2021-06-12 19:56:14,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.7924311926605503) internal successors, (2435), 872 states have internal predecessors, (2435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2435 transitions. [2021-06-12 19:56:14,594 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2435 transitions. Word has length 17 [2021-06-12 19:56:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:14,594 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2435 transitions. [2021-06-12 19:56:14,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:14,594 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2435 transitions. [2021-06-12 19:56:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:14,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:14,595 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:14,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-06-12 19:56:14,795 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:14,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:14,796 INFO L82 PathProgramCache]: Analyzing trace with hash 161991420, now seen corresponding path program 325 times [2021-06-12 19:56:14,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:14,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859182409] [2021-06-12 19:56:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:14,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:14,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859182409] [2021-06-12 19:56:14,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859182409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:14,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9194421] [2021-06-12 19:56:14,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:15,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:15,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:15,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:15,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,052 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:56:15,052 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:15,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:15,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:56:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:15,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9194421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:15,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:15,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:15,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371360305] [2021-06-12 19:56:15,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:15,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:15,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:15,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:15,076 INFO L87 Difference]: Start difference. First operand 873 states and 2435 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:16,080 INFO L93 Difference]: Finished difference Result 1134 states and 2895 transitions. [2021-06-12 19:56:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:56:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:16,081 INFO L225 Difference]: With dead ends: 1134 [2021-06-12 19:56:16,082 INFO L226 Difference]: Without dead ends: 1134 [2021-06-12 19:56:16,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 861.2ms TimeCoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:56:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2021-06-12 19:56:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 865. [2021-06-12 19:56:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 2.792824074074074) internal successors, (2413), 864 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2413 transitions. [2021-06-12 19:56:16,092 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2413 transitions. Word has length 17 [2021-06-12 19:56:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:16,092 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2413 transitions. [2021-06-12 19:56:16,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2413 transitions. [2021-06-12 19:56:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:56:16,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:16,093 INFO L472 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:16,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2109,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:16,294 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1235076800, now seen corresponding path program 326 times [2021-06-12 19:56:16,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:16,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579467323] [2021-06-12 19:56:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:16,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:16,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579467323] [2021-06-12 19:56:16,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579467323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851992193] [2021-06-12 19:56:16,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:16,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:16,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:16,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:56:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:16,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:56:16,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:16,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:56:16,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,562 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:56:16,562 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:16,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:16,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:56:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:16,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851992193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:16,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:16,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 19:56:16,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722750810] [2021-06-12 19:56:16,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:56:16,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:56:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:16,586 INFO L87 Difference]: Start difference. First operand 865 states and 2413 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:16,834 INFO L93 Difference]: Finished difference Result 982 states and 2610 transitions. [2021-06-12 19:56:16,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:56:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-12 19:56:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:16,835 INFO L225 Difference]: With dead ends: 982 [2021-06-12 19:56:16,835 INFO L226 Difference]: Without dead ends: 982 [2021-06-12 19:56:16,835 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:56:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-12 19:56:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 819. [2021-06-12 19:56:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.7689486552567235) internal successors, (2265), 818 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2265 transitions. [2021-06-12 19:56:16,843 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2265 transitions. Word has length 17 [2021-06-12 19:56:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:16,843 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2265 transitions. [2021-06-12 19:56:16,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:16,843 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2265 transitions. [2021-06-12 19:56:16,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:16,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:16,844 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:17,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-06-12 19:56:17,045 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:17,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:17,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1502419942, now seen corresponding path program 327 times [2021-06-12 19:56:17,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:17,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789961547] [2021-06-12 19:56:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:17,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789961547] [2021-06-12 19:56:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789961547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228244951] [2021-06-12 19:56:17,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:17,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:56:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:17,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:18,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:56:18,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,494 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-06-12 19:56:18,494 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:18,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:56:18,506 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:18,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:18,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:56:18,536 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:18,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:18,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:18,548 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-12 19:56:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:18,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228244951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:18,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:18,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:56:18,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550093637] [2021-06-12 19:56:18,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:56:18,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:56:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:18,590 INFO L87 Difference]: Start difference. First operand 819 states and 2265 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:19,199 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83 [2021-06-12 19:56:19,442 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 92 [2021-06-12 19:56:19,638 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-12 19:56:19,938 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 96 [2021-06-12 19:56:20,121 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-12 19:56:20,420 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 95 [2021-06-12 19:56:20,606 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2021-06-12 19:56:20,924 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 101 [2021-06-12 19:56:21,236 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-12 19:56:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:21,449 INFO L93 Difference]: Finished difference Result 1360 states and 3680 transitions. [2021-06-12 19:56:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:56:21,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:21,451 INFO L225 Difference]: With dead ends: 1360 [2021-06-12 19:56:21,451 INFO L226 Difference]: Without dead ends: 1354 [2021-06-12 19:56:21,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 3281.9ms TimeCoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:56:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-12 19:56:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 831. [2021-06-12 19:56:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.763855421686747) internal successors, (2294), 830 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2294 transitions. [2021-06-12 19:56:21,461 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2294 transitions. Word has length 18 [2021-06-12 19:56:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:21,461 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2294 transitions. [2021-06-12 19:56:21,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2294 transitions. [2021-06-12 19:56:21,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:21,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:21,462 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:21,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2113 [2021-06-12 19:56:21,662 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash 734866218, now seen corresponding path program 328 times [2021-06-12 19:56:21,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:21,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562823146] [2021-06-12 19:56:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:22,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:22,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562823146] [2021-06-12 19:56:22,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562823146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655103499] [2021-06-12 19:56:22,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:22,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:22,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:22,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:56:22,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:56:22,862 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:22,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:22,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:56:22,869 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,881 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-06-12 19:56:22,881 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:22,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:22,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-12 19:56:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:22,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655103499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:22,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:22,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:56:22,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731819727] [2021-06-12 19:56:22,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:56:22,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:22,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:56:22,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:22,913 INFO L87 Difference]: Start difference. First operand 831 states and 2294 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:24,966 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2021-06-12 19:56:25,342 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 65 [2021-06-12 19:56:25,558 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2021-06-12 19:56:25,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:25,891 INFO L93 Difference]: Finished difference Result 1148 states and 3019 transitions. [2021-06-12 19:56:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 19:56:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:25,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:25,893 INFO L225 Difference]: With dead ends: 1148 [2021-06-12 19:56:25,893 INFO L226 Difference]: Without dead ends: 1139 [2021-06-12 19:56:25,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 3283.8ms TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:56:25,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-06-12 19:56:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 816. [2021-06-12 19:56:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.7607361963190185) internal successors, (2250), 815 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2250 transitions. [2021-06-12 19:56:25,901 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2250 transitions. Word has length 18 [2021-06-12 19:56:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:25,901 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2250 transitions. [2021-06-12 19:56:25,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2250 transitions. [2021-06-12 19:56:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:25,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:25,902 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:26,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2133 [2021-06-12 19:56:26,103 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:26,103 INFO L82 PathProgramCache]: Analyzing trace with hash 742596616, now seen corresponding path program 329 times [2021-06-12 19:56:26,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:26,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26428703] [2021-06-12 19:56:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:26,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26428703] [2021-06-12 19:56:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26428703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621760394] [2021-06-12 19:56:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:26,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:26,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:26,593 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:26,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:27,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:27,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:27,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:27,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:56:27,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,285 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-12 19:56:27,285 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:27,285 INFO L518 ElimStorePlain]: Eliminatee v_prenex_156 vanished before elimination [2021-06-12 19:56:27,285 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-12 19:56:27,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:27,286 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:56:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:27,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621760394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:27,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:27,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:56:27,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720289001] [2021-06-12 19:56:27,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:56:27,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:27,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:56:27,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:27,321 INFO L87 Difference]: Start difference. First operand 816 states and 2250 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:27,992 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-06-12 19:56:28,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:28,237 INFO L93 Difference]: Finished difference Result 1003 states and 2681 transitions. [2021-06-12 19:56:28,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:56:28,237 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:28,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:28,238 INFO L225 Difference]: With dead ends: 1003 [2021-06-12 19:56:28,238 INFO L226 Difference]: Without dead ends: 999 [2021-06-12 19:56:28,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1523.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:56:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-12 19:56:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 816. [2021-06-12 19:56:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.7607361963190185) internal successors, (2250), 815 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2250 transitions. [2021-06-12 19:56:28,246 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2250 transitions. Word has length 18 [2021-06-12 19:56:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:28,246 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2250 transitions. [2021-06-12 19:56:28,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2250 transitions. [2021-06-12 19:56:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:28,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:28,247 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:28,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2156 [2021-06-12 19:56:28,455 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash -746808380, now seen corresponding path program 330 times [2021-06-12 19:56:28,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:28,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068704606] [2021-06-12 19:56:28,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:28,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:28,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068704606] [2021-06-12 19:56:28,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068704606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:28,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985402280] [2021-06-12 19:56:28,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:28,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:28,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:28,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:28,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:29,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:56:29,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:29,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:29,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:29,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,478 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-12 19:56:29,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_160 vanished before elimination [2021-06-12 19:56:29,478 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:29,478 INFO L518 ElimStorePlain]: Eliminatee v_prenex_159 vanished before elimination [2021-06-12 19:56:29,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:29,479 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:56:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:29,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985402280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:29,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:29,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:56:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716991606] [2021-06-12 19:56:29,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:56:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:56:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:29,514 INFO L87 Difference]: Start difference. First operand 816 states and 2250 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:31,126 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-06-12 19:56:31,332 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2021-06-12 19:56:31,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:31,701 INFO L93 Difference]: Finished difference Result 1084 states and 2849 transitions. [2021-06-12 19:56:31,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:56:31,701 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:31,702 INFO L225 Difference]: With dead ends: 1084 [2021-06-12 19:56:31,702 INFO L226 Difference]: Without dead ends: 1070 [2021-06-12 19:56:31,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 2318.5ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:56:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2021-06-12 19:56:31,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 832. [2021-06-12 19:56:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 2.766546329723225) internal successors, (2299), 831 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:31,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2299 transitions. [2021-06-12 19:56:31,711 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2299 transitions. Word has length 18 [2021-06-12 19:56:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:31,711 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2299 transitions. [2021-06-12 19:56:31,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2299 transitions. [2021-06-12 19:56:31,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:31,712 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:31,712 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:31,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2174,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:31,912 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash 326277000, now seen corresponding path program 331 times [2021-06-12 19:56:31,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:31,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481261019] [2021-06-12 19:56:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:32,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:32,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481261019] [2021-06-12 19:56:32,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481261019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:32,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492865307] [2021-06-12 19:56:32,528 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:32,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:32,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:33,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:33,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:56:33,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,229 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-12 19:56:33,229 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:33,229 INFO L518 ElimStorePlain]: Eliminatee v_prenex_166 vanished before elimination [2021-06-12 19:56:33,229 INFO L518 ElimStorePlain]: Eliminatee v_prenex_167 vanished before elimination [2021-06-12 19:56:33,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:33,229 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:56:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492865307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:33,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:33,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:56:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244843514] [2021-06-12 19:56:33,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:56:33,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:56:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:33,265 INFO L87 Difference]: Start difference. First operand 832 states and 2299 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:33,733 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-12 19:56:34,265 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-12 19:56:34,621 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-12 19:56:34,923 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 95 [2021-06-12 19:56:35,572 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-12 19:56:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:35,589 INFO L93 Difference]: Finished difference Result 1046 states and 2780 transitions. [2021-06-12 19:56:35,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:56:35,590 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:35,591 INFO L225 Difference]: With dead ends: 1046 [2021-06-12 19:56:35,591 INFO L226 Difference]: Without dead ends: 1038 [2021-06-12 19:56:35,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2794.8ms TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:56:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-12 19:56:35,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 836. [2021-06-12 19:56:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 2.7676646706586827) internal successors, (2311), 835 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2311 transitions. [2021-06-12 19:56:35,599 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2311 transitions. Word has length 18 [2021-06-12 19:56:35,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:35,599 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2311 transitions. [2021-06-12 19:56:35,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:35,599 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2311 transitions. [2021-06-12 19:56:35,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:35,600 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:35,600 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:35,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2194,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:35,800 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash -767814588, now seen corresponding path program 332 times [2021-06-12 19:56:35,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:35,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103855375] [2021-06-12 19:56:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:36,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:36,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103855375] [2021-06-12 19:56:36,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103855375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:36,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024604616] [2021-06-12 19:56:36,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:36,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:36,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:36,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:56:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:36,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-12 19:56:36,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:36,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:36,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:56:37,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:37,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:37,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:37,070 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:37,125 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-06-12 19:56:37,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:37,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:56:37,129 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:37,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:37,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:37,152 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-12 19:56:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:37,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024604616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:37,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:37,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 19:56:37,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879424019] [2021-06-12 19:56:37,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:56:37,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:56:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:37,244 INFO L87 Difference]: Start difference. First operand 836 states and 2311 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:37,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:37,863 INFO L93 Difference]: Finished difference Result 1077 states and 2845 transitions. [2021-06-12 19:56:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:56:37,864 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:37,865 INFO L225 Difference]: With dead ends: 1077 [2021-06-12 19:56:37,865 INFO L226 Difference]: Without dead ends: 1071 [2021-06-12 19:56:37,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1314.1ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:56:37,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-12 19:56:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 856. [2021-06-12 19:56:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.76140350877193) internal successors, (2361), 855 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2361 transitions. [2021-06-12 19:56:37,873 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2361 transitions. Word has length 18 [2021-06-12 19:56:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:37,873 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2361 transitions. [2021-06-12 19:56:37,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2361 transitions. [2021-06-12 19:56:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:37,874 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:37,874 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:38,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-06-12 19:56:38,074 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:38,075 INFO L82 PathProgramCache]: Analyzing trace with hash -349154778, now seen corresponding path program 333 times [2021-06-12 19:56:38,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:38,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686413637] [2021-06-12 19:56:38,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:38,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686413637] [2021-06-12 19:56:38,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686413637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:38,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477142614] [2021-06-12 19:56:38,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:38,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:56:38,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:38,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:56:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:39,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:56:39,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:56:39,104 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-12 19:56:39,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-12 19:56:39,125 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,182 INFO L628 ElimStorePlain]: treesize reduction 93, result has 44.0 percent of original size [2021-06-12 19:56:39,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:39,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:56:39,185 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:39,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:39,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:39,208 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-06-12 19:56:39,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:39,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477142614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:39,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:39,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:56:39,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077107776] [2021-06-12 19:56:39,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:56:39,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:39,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:56:39,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:39,302 INFO L87 Difference]: Start difference. First operand 856 states and 2361 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:39,834 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-12 19:56:40,101 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-12 19:56:40,504 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 74 [2021-06-12 19:56:40,919 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-12 19:56:41,284 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-06-12 19:56:41,585 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-12 19:56:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:41,722 INFO L93 Difference]: Finished difference Result 1046 states and 2755 transitions. [2021-06-12 19:56:41,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:56:41,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:41,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:41,723 INFO L225 Difference]: With dead ends: 1046 [2021-06-12 19:56:41,723 INFO L226 Difference]: Without dead ends: 1034 [2021-06-12 19:56:41,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2825.1ms TimeCoverageRelationStatistics Valid=202, Invalid=1604, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:56:41,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-06-12 19:56:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 882. [2021-06-12 19:56:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.7763904653802496) internal successors, (2446), 881 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2446 transitions. [2021-06-12 19:56:41,731 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2446 transitions. Word has length 18 [2021-06-12 19:56:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:41,732 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2446 transitions. [2021-06-12 19:56:41,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2446 transitions. [2021-06-12 19:56:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:41,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:41,732 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:41,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2222 [2021-06-12 19:56:41,933 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -101782042, now seen corresponding path program 334 times [2021-06-12 19:56:41,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:41,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691373493] [2021-06-12 19:56:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:42,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:42,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691373493] [2021-06-12 19:56:42,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691373493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:42,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085470141] [2021-06-12 19:56:42,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:42,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:56:42,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:42,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:42,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:42,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:42,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:42,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:42,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:42,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:56:42,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,798 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-06-12 19:56:42,798 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:56:42,798 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:42,798 INFO L518 ElimStorePlain]: Eliminatee v_prenex_169 vanished before elimination [2021-06-12 19:56:42,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:42,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-12 19:56:42,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:42,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085470141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:42,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:42,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:56:42,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314804820] [2021-06-12 19:56:42,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:56:42,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:42,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:56:42,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:42,825 INFO L87 Difference]: Start difference. First operand 882 states and 2446 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:43,989 INFO L93 Difference]: Finished difference Result 1043 states and 2788 transitions. [2021-06-12 19:56:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:56:43,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:43,990 INFO L225 Difference]: With dead ends: 1043 [2021-06-12 19:56:43,990 INFO L226 Difference]: Without dead ends: 1039 [2021-06-12 19:56:43,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1532.0ms TimeCoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:56:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-12 19:56:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 917. [2021-06-12 19:56:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.7903930131004366) internal successors, (2556), 916 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2556 transitions. [2021-06-12 19:56:43,999 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2556 transitions. Word has length 18 [2021-06-12 19:56:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:43,999 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2556 transitions. [2021-06-12 19:56:43,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2556 transitions. [2021-06-12 19:56:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:44,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:44,000 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:44,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2233 [2021-06-12 19:56:44,200 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash -518101658, now seen corresponding path program 335 times [2021-06-12 19:56:44,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:44,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779279093] [2021-06-12 19:56:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:44,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:44,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779279093] [2021-06-12 19:56:44,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779279093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:44,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363829151] [2021-06-12 19:56:44,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:44,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:56:44,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:44,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:44,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:44,860 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-12 19:56:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:56:45,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:45,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,240 INFO L628 ElimStorePlain]: treesize reduction 91, result has 45.8 percent of original size [2021-06-12 19:56:45,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:45,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-12 19:56:45,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:45,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,257 INFO L518 ElimStorePlain]: Eliminatee v_prenex_173 vanished before elimination [2021-06-12 19:56:45,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:45,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:56:45,260 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:56:45,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:45,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:45,270 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-12 19:56:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:45,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363829151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:45,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:45,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:56:45,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83086295] [2021-06-12 19:56:45,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:56:45,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:45,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:56:45,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:56:45,307 INFO L87 Difference]: Start difference. First operand 917 states and 2556 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:46,793 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-06-12 19:56:46,951 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2021-06-12 19:56:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:47,076 INFO L93 Difference]: Finished difference Result 1092 states and 2931 transitions. [2021-06-12 19:56:47,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:56:47,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:47,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:47,078 INFO L225 Difference]: With dead ends: 1092 [2021-06-12 19:56:47,078 INFO L226 Difference]: Without dead ends: 1072 [2021-06-12 19:56:47,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 2122.8ms TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:56:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-12 19:56:47,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 946. [2021-06-12 19:56:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.785185185185185) internal successors, (2632), 945 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2632 transitions. [2021-06-12 19:56:47,087 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2632 transitions. Word has length 18 [2021-06-12 19:56:47,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:47,087 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2632 transitions. [2021-06-12 19:56:47,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2632 transitions. [2021-06-12 19:56:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:47,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:47,088 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:47,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2252,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:47,288 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:47,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:47,288 INFO L82 PathProgramCache]: Analyzing trace with hash -539107866, now seen corresponding path program 336 times [2021-06-12 19:56:47,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:47,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627289952] [2021-06-12 19:56:47,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:47,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:47,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627289952] [2021-06-12 19:56:47,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627289952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:47,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550008326] [2021-06-12 19:56:47,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:47,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:56:47,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:47,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:47,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:48,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:48,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:48,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:48,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:48,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:48,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:48,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,312 INFO L628 ElimStorePlain]: treesize reduction 151, result has 6.8 percent of original size [2021-06-12 19:56:48,312 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:48,312 INFO L518 ElimStorePlain]: Eliminatee v_prenex_177 vanished before elimination [2021-06-12 19:56:48,312 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-06-12 19:56:48,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:48,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:56:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550008326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:48,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:48,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:56:48,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645314033] [2021-06-12 19:56:48,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:56:48,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:48,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:56:48,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:56:48,347 INFO L87 Difference]: Start difference. First operand 946 states and 2632 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:50,005 INFO L93 Difference]: Finished difference Result 1041 states and 2835 transitions. [2021-06-12 19:56:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:56:50,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:50,006 INFO L225 Difference]: With dead ends: 1041 [2021-06-12 19:56:50,006 INFO L226 Difference]: Without dead ends: 1037 [2021-06-12 19:56:50,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1887.1ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:56:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-12 19:56:50,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 946. [2021-06-12 19:56:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 2.785185185185185) internal successors, (2632), 945 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 2632 transitions. [2021-06-12 19:56:50,015 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 2632 transitions. Word has length 18 [2021-06-12 19:56:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:50,015 INFO L482 AbstractCegarLoop]: Abstraction has 946 states and 2632 transitions. [2021-06-12 19:56:50,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 2632 transitions. [2021-06-12 19:56:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:50,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:50,016 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:50,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2273,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:50,216 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:50,217 INFO L82 PathProgramCache]: Analyzing trace with hash 312380492, now seen corresponding path program 337 times [2021-06-12 19:56:50,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:50,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710602692] [2021-06-12 19:56:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:50,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:50,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710602692] [2021-06-12 19:56:50,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710602692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:50,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442314435] [2021-06-12 19:56:50,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:50,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:56:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:51,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:56:51,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:56:51,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:51,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:51,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:56:51,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,323 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-06-12 19:56:51,324 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:56:51,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:56:51,324 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-12 19:56:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:51,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442314435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:51,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:51,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:56:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058277190] [2021-06-12 19:56:51,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:56:51,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:51,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:56:51,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:56:51,355 INFO L87 Difference]: Start difference. First operand 946 states and 2632 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,033 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2021-06-12 19:56:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:53,467 INFO L93 Difference]: Finished difference Result 1121 states and 2991 transitions. [2021-06-12 19:56:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:56:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:53,468 INFO L225 Difference]: With dead ends: 1121 [2021-06-12 19:56:53,468 INFO L226 Difference]: Without dead ends: 1115 [2021-06-12 19:56:53,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2392.8ms TimeCoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:56:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-06-12 19:56:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 963. [2021-06-12 19:56:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 2.7972972972972974) internal successors, (2691), 962 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2691 transitions. [2021-06-12 19:56:53,478 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2691 transitions. Word has length 18 [2021-06-12 19:56:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:53,478 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 2691 transitions. [2021-06-12 19:56:53,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:53,478 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2691 transitions. [2021-06-12 19:56:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:53,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:53,479 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:53,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2292,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:53,679 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:53,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash 320110890, now seen corresponding path program 338 times [2021-06-12 19:56:53,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:53,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159179091] [2021-06-12 19:56:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:54,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:54,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159179091] [2021-06-12 19:56:54,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159179091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:54,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481151794] [2021-06-12 19:56:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:54,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:56:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:54,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:56:54,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:54,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-12 19:56:54,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:56:54,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:54,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:54,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:54,778 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,832 INFO L628 ElimStorePlain]: treesize reduction 97, result has 42.9 percent of original size [2021-06-12 19:56:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:54,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:56:54,836 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:54,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:54,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:54,858 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-12 19:56:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:54,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481151794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:54,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:54,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 19:56:54,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669997723] [2021-06-12 19:56:54,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:56:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:56:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:54,952 INFO L87 Difference]: Start difference. First operand 963 states and 2691 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:56,390 INFO L93 Difference]: Finished difference Result 1135 states and 3035 transitions. [2021-06-12 19:56:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:56:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:56,392 INFO L225 Difference]: With dead ends: 1135 [2021-06-12 19:56:56,392 INFO L226 Difference]: Without dead ends: 1123 [2021-06-12 19:56:56,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1910.4ms TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:56:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-06-12 19:56:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 974. [2021-06-12 19:56:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 2.8098663926002057) internal successors, (2734), 973 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 2734 transitions. [2021-06-12 19:56:56,401 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 2734 transitions. Word has length 18 [2021-06-12 19:56:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:56,401 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 2734 transitions. [2021-06-12 19:56:56,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 2734 transitions. [2021-06-12 19:56:56,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:56,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:56,402 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:56,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2314 [2021-06-12 19:56:56,602 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:56,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1169294106, now seen corresponding path program 339 times [2021-06-12 19:56:56,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:56,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103392796] [2021-06-12 19:56:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:56:57,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:57,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:56:57,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103392796] [2021-06-12 19:56:57,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103392796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:57,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807618493] [2021-06-12 19:56:57,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:57,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:56:57,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:56:57,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:56:57,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:56:57,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-12 19:56:57,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:56:57,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:57,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:56:57,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:56:57,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,831 INFO L628 ElimStorePlain]: treesize reduction 89, result has 45.1 percent of original size [2021-06-12 19:56:57,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:56:57,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:56:57,835 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:56:57,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:56:57,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:56:57,858 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-12 19:56:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:56:57,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807618493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:56:57,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:56:57,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 19:56:57,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473536485] [2021-06-12 19:56:57,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:56:57,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:56:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:56:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:56:57,957 INFO L87 Difference]: Start difference. First operand 974 states and 2734 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,377 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-06-12 19:56:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:56:59,589 INFO L93 Difference]: Finished difference Result 1092 states and 2973 transitions. [2021-06-12 19:56:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:56:59,589 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:56:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:56:59,590 INFO L225 Difference]: With dead ends: 1092 [2021-06-12 19:56:59,590 INFO L226 Difference]: Without dead ends: 1084 [2021-06-12 19:56:59,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 2086.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:56:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-06-12 19:56:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 977. [2021-06-12 19:56:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.810450819672131) internal successors, (2743), 976 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2743 transitions. [2021-06-12 19:56:59,605 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2743 transitions. Word has length 18 [2021-06-12 19:56:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:56:59,605 INFO L482 AbstractCegarLoop]: Abstraction has 977 states and 2743 transitions. [2021-06-12 19:56:59,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:56:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2743 transitions. [2021-06-12 19:56:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:56:59,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:56:59,606 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:56:59,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2325,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:56:59,806 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:56:59,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:56:59,806 INFO L82 PathProgramCache]: Analyzing trace with hash -96208726, now seen corresponding path program 340 times [2021-06-12 19:56:59,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:56:59,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521671754] [2021-06-12 19:56:59,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:56:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:00,370 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:00,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:00,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521671754] [2021-06-12 19:57:00,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521671754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:00,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022370127] [2021-06-12 19:57:00,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:00,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:00,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:00,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:00,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:01,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:01,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:01,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:01,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:57:01,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,071 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-12 19:57:01,071 INFO L518 ElimStorePlain]: Eliminatee v_prenex_182 vanished before elimination [2021-06-12 19:57:01,071 INFO L518 ElimStorePlain]: Eliminatee v_prenex_183 vanished before elimination [2021-06-12 19:57:01,071 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:01,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:01,071 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022370127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:01,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:01,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:01,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746095883] [2021-06-12 19:57:01,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:01,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:01,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:01,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:01,106 INFO L87 Difference]: Start difference. First operand 977 states and 2743 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:01,733 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-12 19:57:01,996 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 86 [2021-06-12 19:57:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:02,468 INFO L93 Difference]: Finished difference Result 1061 states and 2921 transitions. [2021-06-12 19:57:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:02,469 INFO L225 Difference]: With dead ends: 1061 [2021-06-12 19:57:02,469 INFO L226 Difference]: Without dead ends: 1057 [2021-06-12 19:57:02,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1933.1ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:57:02,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-12 19:57:02,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 980. [2021-06-12 19:57:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 2.8110316649642493) internal successors, (2752), 979 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 2752 transitions. [2021-06-12 19:57:02,478 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 2752 transitions. Word has length 18 [2021-06-12 19:57:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:02,478 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 2752 transitions. [2021-06-12 19:57:02,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 2752 transitions. [2021-06-12 19:57:02,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:02,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:02,479 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:02,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2336 [2021-06-12 19:57:02,679 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:02,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1190300314, now seen corresponding path program 341 times [2021-06-12 19:57:02,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:02,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868142842] [2021-06-12 19:57:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:02,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868142842] [2021-06-12 19:57:02,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868142842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439421296] [2021-06-12 19:57:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:02,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:02,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:02,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:02,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:03,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:57:03,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:03,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:03,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:03,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,593 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-12 19:57:03,593 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:03,593 INFO L518 ElimStorePlain]: Eliminatee v_prenex_187 vanished before elimination [2021-06-12 19:57:03,593 INFO L518 ElimStorePlain]: Eliminatee v_prenex_188 vanished before elimination [2021-06-12 19:57:03,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:03,594 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:03,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439421296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:03,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:03,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:57:03,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376105771] [2021-06-12 19:57:03,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:57:03,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:57:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:03,625 INFO L87 Difference]: Start difference. First operand 980 states and 2752 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:05,012 INFO L93 Difference]: Finished difference Result 1109 states and 3024 transitions. [2021-06-12 19:57:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:57:05,012 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:05,013 INFO L225 Difference]: With dead ends: 1109 [2021-06-12 19:57:05,013 INFO L226 Difference]: Without dead ends: 1105 [2021-06-12 19:57:05,014 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1554.3ms TimeCoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:57:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-06-12 19:57:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 987. [2021-06-12 19:57:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.814401622718053) internal successors, (2775), 986 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2775 transitions. [2021-06-12 19:57:05,022 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2775 transitions. Word has length 18 [2021-06-12 19:57:05,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:05,022 INFO L482 AbstractCegarLoop]: Abstraction has 987 states and 2775 transitions. [2021-06-12 19:57:05,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2775 transitions. [2021-06-12 19:57:05,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:05,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:05,023 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:05,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2354 [2021-06-12 19:57:05,224 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:05,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:05,224 INFO L82 PathProgramCache]: Analyzing trace with hash 405932714, now seen corresponding path program 342 times [2021-06-12 19:57:05,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:05,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623629297] [2021-06-12 19:57:05,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:05,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:05,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623629297] [2021-06-12 19:57:05,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623629297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:05,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167159474] [2021-06-12 19:57:05,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:05,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:05,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:06,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:06,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:06,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-12 19:57:06,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:06,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:57:06,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,423 INFO L628 ElimStorePlain]: treesize reduction 73, result has 17.0 percent of original size [2021-06-12 19:57:06,424 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:06,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:06,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:209, output treesize:11 [2021-06-12 19:57:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167159474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:06,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:06,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:06,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639442108] [2021-06-12 19:57:06,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:06,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:06,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:06,457 INFO L87 Difference]: Start difference. First operand 987 states and 2775 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:08,269 INFO L93 Difference]: Finished difference Result 1066 states and 2915 transitions. [2021-06-12 19:57:08,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:57:08,270 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:08,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:08,270 INFO L225 Difference]: With dead ends: 1066 [2021-06-12 19:57:08,270 INFO L226 Difference]: Without dead ends: 1053 [2021-06-12 19:57:08,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 2280.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:57:08,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-06-12 19:57:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1013. [2021-06-12 19:57:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.8033596837944663) internal successors, (2837), 1012 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2837 transitions. [2021-06-12 19:57:08,280 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2837 transitions. Word has length 18 [2021-06-12 19:57:08,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:08,280 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 2837 transitions. [2021-06-12 19:57:08,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2837 transitions. [2021-06-12 19:57:08,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:08,281 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:08,281 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:08,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2373,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:08,482 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:08,482 INFO L82 PathProgramCache]: Analyzing trace with hash 973957934, now seen corresponding path program 343 times [2021-06-12 19:57:08,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:08,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325028495] [2021-06-12 19:57:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:57:08,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:08,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325028495] [2021-06-12 19:57:08,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325028495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:08,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800285110] [2021-06-12 19:57:08,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:08,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:08,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:09,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:09,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:09,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-12 19:57:09,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:09,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:09,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,385 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-06-12 19:57:09,385 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:09,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:09,386 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-12 19:57:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:09,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800285110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:09,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:09,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:09,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269486464] [2021-06-12 19:57:09,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:09,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:09,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:09,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:09,414 INFO L87 Difference]: Start difference. First operand 1013 states and 2837 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:10,942 INFO L93 Difference]: Finished difference Result 1087 states and 2996 transitions. [2021-06-12 19:57:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:10,944 INFO L225 Difference]: With dead ends: 1087 [2021-06-12 19:57:10,944 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 19:57:10,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1899.5ms TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:57:10,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 19:57:10,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1020. [2021-06-12 19:57:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 2.8115799803729145) internal successors, (2865), 1019 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 2865 transitions. [2021-06-12 19:57:10,953 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 2865 transitions. Word has length 18 [2021-06-12 19:57:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:10,953 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 2865 transitions. [2021-06-12 19:57:10,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 2865 transitions. [2021-06-12 19:57:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:10,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:10,954 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:11,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:11,155 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:11,155 INFO L82 PathProgramCache]: Analyzing trace with hash -507716664, now seen corresponding path program 344 times [2021-06-12 19:57:11,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:11,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339514429] [2021-06-12 19:57:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:11,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:11,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339514429] [2021-06-12 19:57:11,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339514429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:11,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519051237] [2021-06-12 19:57:11,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:11,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:11,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:11,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:57:11,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:11,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-12 19:57:11,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:57:11,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:57:11,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:11,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:11,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:11,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-12 19:57:11,982 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:12,036 INFO L628 ElimStorePlain]: treesize reduction 103, result has 39.4 percent of original size [2021-06-12 19:57:12,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:12,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:57:12,040 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:12,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:12,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:12,063 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-06-12 19:57:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:12,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519051237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:12,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:12,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 19:57:12,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757349338] [2021-06-12 19:57:12,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:57:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:57:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:12,143 INFO L87 Difference]: Start difference. First operand 1020 states and 2865 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:12,910 INFO L93 Difference]: Finished difference Result 1136 states and 3101 transitions. [2021-06-12 19:57:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:57:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:12,911 INFO L225 Difference]: With dead ends: 1136 [2021-06-12 19:57:12,911 INFO L226 Difference]: Without dead ends: 1129 [2021-06-12 19:57:12,912 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1141.8ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:57:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-06-12 19:57:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1037. [2021-06-12 19:57:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 1036 states have (on average 2.8291505791505793) internal successors, (2931), 1036 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 2931 transitions. [2021-06-12 19:57:12,921 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 2931 transitions. Word has length 18 [2021-06-12 19:57:12,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:12,921 INFO L482 AbstractCegarLoop]: Abstraction has 1037 states and 2931 transitions. [2021-06-12 19:57:12,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 2931 transitions. [2021-06-12 19:57:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:12,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:12,922 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:13,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2438,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:13,123 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:13,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2018127868, now seen corresponding path program 345 times [2021-06-12 19:57:13,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:13,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189649445] [2021-06-12 19:57:13,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:13,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:13,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189649445] [2021-06-12 19:57:13,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189649445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:13,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270319751] [2021-06-12 19:57:13,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:13,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:57:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:13,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:13,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:14,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:14,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:14,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:14,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:57:14,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,046 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-06-12 19:57:14,047 INFO L518 ElimStorePlain]: Eliminatee v_prenex_191 vanished before elimination [2021-06-12 19:57:14,047 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:57:14,047 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:14,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:14,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-12 19:57:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:14,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270319751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:14,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:14,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:57:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137485321] [2021-06-12 19:57:14,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:57:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:14,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:57:14,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:14,075 INFO L87 Difference]: Start difference. First operand 1037 states and 2931 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:14,995 INFO L93 Difference]: Finished difference Result 1209 states and 3323 transitions. [2021-06-12 19:57:14,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:14,995 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:14,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:14,996 INFO L225 Difference]: With dead ends: 1209 [2021-06-12 19:57:14,996 INFO L226 Difference]: Without dead ends: 1205 [2021-06-12 19:57:14,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1297.8ms TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:57:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-06-12 19:57:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1051. [2021-06-12 19:57:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1050 states have (on average 2.84) internal successors, (2982), 1050 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 2982 transitions. [2021-06-12 19:57:15,006 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 2982 transitions. Word has length 18 [2021-06-12 19:57:15,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:15,006 INFO L482 AbstractCegarLoop]: Abstraction has 1051 states and 2982 transitions. [2021-06-12 19:57:15,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 2982 transitions. [2021-06-12 19:57:15,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:15,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:15,007 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:15,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2448 [2021-06-12 19:57:15,208 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1625646980, now seen corresponding path program 346 times [2021-06-12 19:57:15,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:15,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021744738] [2021-06-12 19:57:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:57:15,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:15,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021744738] [2021-06-12 19:57:15,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021744738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:15,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224567012] [2021-06-12 19:57:15,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:15,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:15,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:15,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:15,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:16,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:57:16,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:16,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,217 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.3 percent of original size [2021-06-12 19:57:16,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:16,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:57:16,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:16,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,236 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:16,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:16,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:57:16,239 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:16,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:16,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:16,249 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-12 19:57:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:16,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224567012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:16,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:16,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:16,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348102266] [2021-06-12 19:57:16,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:16,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:16,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:16,287 INFO L87 Difference]: Start difference. First operand 1051 states and 2982 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:16,768 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2021-06-12 19:57:17,497 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-12 19:57:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:17,755 INFO L93 Difference]: Finished difference Result 1096 states and 3062 transitions. [2021-06-12 19:57:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:17,756 INFO L225 Difference]: With dead ends: 1096 [2021-06-12 19:57:17,756 INFO L226 Difference]: Without dead ends: 1082 [2021-06-12 19:57:17,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1841.9ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:57:17,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-06-12 19:57:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1022. [2021-06-12 19:57:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.8481880509304602) internal successors, (2908), 1021 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:17,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2908 transitions. [2021-06-12 19:57:17,765 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2908 transitions. Word has length 18 [2021-06-12 19:57:17,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:17,766 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 2908 transitions. [2021-06-12 19:57:17,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:17,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2908 transitions. [2021-06-12 19:57:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:17,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:17,766 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:17,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2468 [2021-06-12 19:57:17,967 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1596234936, now seen corresponding path program 347 times [2021-06-12 19:57:17,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:17,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422151514] [2021-06-12 19:57:17,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:18,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:18,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:18,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422151514] [2021-06-12 19:57:18,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422151514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:18,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457262256] [2021-06-12 19:57:18,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:18,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:18,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:18,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:18,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:18,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:18,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:18,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:57:18,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,941 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-12 19:57:18,941 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:18,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_198 vanished before elimination [2021-06-12 19:57:18,941 INFO L518 ElimStorePlain]: Eliminatee v_prenex_199 vanished before elimination [2021-06-12 19:57:18,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:18,941 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:18,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457262256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:18,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:18,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:18,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696119977] [2021-06-12 19:57:18,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:18,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:18,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:18,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:18,971 INFO L87 Difference]: Start difference. First operand 1022 states and 2908 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:20,191 INFO L93 Difference]: Finished difference Result 1197 states and 3268 transitions. [2021-06-12 19:57:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:20,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:20,192 INFO L225 Difference]: With dead ends: 1197 [2021-06-12 19:57:20,192 INFO L226 Difference]: Without dead ends: 1187 [2021-06-12 19:57:20,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1534.1ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:57:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-06-12 19:57:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1054. [2021-06-12 19:57:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.8622981956315288) internal successors, (3014), 1053 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3014 transitions. [2021-06-12 19:57:20,202 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3014 transitions. Word has length 18 [2021-06-12 19:57:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:20,202 INFO L482 AbstractCegarLoop]: Abstraction has 1054 states and 3014 transitions. [2021-06-12 19:57:20,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:20,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3014 transitions. [2021-06-12 19:57:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:20,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:20,203 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:20,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2487,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:20,404 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash -561310396, now seen corresponding path program 348 times [2021-06-12 19:57:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:20,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689828208] [2021-06-12 19:57:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:20,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:20,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689828208] [2021-06-12 19:57:20,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689828208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:20,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122020528] [2021-06-12 19:57:20,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:20,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:57:20,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:20,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:57:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:21,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:57:21,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:57:21,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-12 19:57:21,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:21,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-12 19:57:21,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:21,331 INFO L628 ElimStorePlain]: treesize reduction 95, result has 41.4 percent of original size [2021-06-12 19:57:21,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:21,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:57:21,335 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:21,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:21,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:21,358 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:301, output treesize:62 [2021-06-12 19:57:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:21,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122020528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:21,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:21,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:57:21,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426429425] [2021-06-12 19:57:21,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:21,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:21,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:21,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:21,441 INFO L87 Difference]: Start difference. First operand 1054 states and 3014 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:22,368 INFO L93 Difference]: Finished difference Result 1175 states and 3258 transitions. [2021-06-12 19:57:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:57:22,368 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:22,370 INFO L225 Difference]: With dead ends: 1175 [2021-06-12 19:57:22,370 INFO L226 Difference]: Without dead ends: 1169 [2021-06-12 19:57:22,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1237.8ms TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:57:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-12 19:57:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1084. [2021-06-12 19:57:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.853185595567867) internal successors, (3090), 1083 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 3090 transitions. [2021-06-12 19:57:22,379 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 3090 transitions. Word has length 18 [2021-06-12 19:57:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:22,380 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 3090 transitions. [2021-06-12 19:57:22,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 3090 transitions. [2021-06-12 19:57:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:22,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:22,381 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:22,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2507,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:22,581 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:22,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 100224874, now seen corresponding path program 349 times [2021-06-12 19:57:22,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:22,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324714996] [2021-06-12 19:57:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:23,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324714996] [2021-06-12 19:57:23,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324714996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847764738] [2021-06-12 19:57:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:23,131 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:57:23,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:57:23,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:23,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:57:23,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,774 INFO L628 ElimStorePlain]: treesize reduction 66, result has 14.3 percent of original size [2021-06-12 19:57:23,774 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:23,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:23,775 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-12 19:57:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:23,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847764738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:23,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:23,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:23,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890766844] [2021-06-12 19:57:23,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:23,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:23,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:23,807 INFO L87 Difference]: Start difference. First operand 1084 states and 3090 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,349 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 74 [2021-06-12 19:57:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:25,679 INFO L93 Difference]: Finished difference Result 1234 states and 3429 transitions. [2021-06-12 19:57:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:57:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:25,681 INFO L225 Difference]: With dead ends: 1234 [2021-06-12 19:57:25,681 INFO L226 Difference]: Without dead ends: 1228 [2021-06-12 19:57:25,681 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2251.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:57:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-06-12 19:57:25,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1110. [2021-06-12 19:57:25,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1109 states have (on average 2.8674481514878267) internal successors, (3180), 1109 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 3180 transitions. [2021-06-12 19:57:25,692 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 3180 transitions. Word has length 18 [2021-06-12 19:57:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:25,692 INFO L482 AbstractCegarLoop]: Abstraction has 1110 states and 3180 transitions. [2021-06-12 19:57:25,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 3180 transitions. [2021-06-12 19:57:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:25,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:25,693 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:25,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2517,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:25,893 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1381449724, now seen corresponding path program 350 times [2021-06-12 19:57:25,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:25,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886501813] [2021-06-12 19:57:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:26,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:26,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886501813] [2021-06-12 19:57:26,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886501813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:26,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973096095] [2021-06-12 19:57:26,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:26,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:26,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:26,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:57:26,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-12 19:57:27,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:57:27,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:27,142 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:27,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:27,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:27,209 INFO L628 ElimStorePlain]: treesize reduction 99, result has 40.4 percent of original size [2021-06-12 19:57:27,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:27,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:57:27,213 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:27,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:27,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:27,236 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 2 variables, input treesize:333, output treesize:62 [2021-06-12 19:57:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:27,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973096095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:27,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:27,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-12 19:57:27,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143415739] [2021-06-12 19:57:27,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:57:27,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:27,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:57:27,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:27,325 INFO L87 Difference]: Start difference. First operand 1110 states and 3180 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:28,602 INFO L93 Difference]: Finished difference Result 1169 states and 3296 transitions. [2021-06-12 19:57:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:57:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:28,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:28,604 INFO L225 Difference]: With dead ends: 1169 [2021-06-12 19:57:28,604 INFO L226 Difference]: Without dead ends: 1161 [2021-06-12 19:57:28,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1925.3ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:57:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-06-12 19:57:28,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1116. [2021-06-12 19:57:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 1115 states have (on average 2.8681614349775786) internal successors, (3198), 1115 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 3198 transitions. [2021-06-12 19:57:28,614 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 3198 transitions. Word has length 18 [2021-06-12 19:57:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:28,614 INFO L482 AbstractCegarLoop]: Abstraction has 1116 states and 3198 transitions. [2021-06-12 19:57:28,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 3198 transitions. [2021-06-12 19:57:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:28,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:28,615 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:28,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2539,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:28,815 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash -308364344, now seen corresponding path program 351 times [2021-06-12 19:57:28,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:28,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119885374] [2021-06-12 19:57:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:29,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:29,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119885374] [2021-06-12 19:57:29,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119885374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:29,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593991476] [2021-06-12 19:57:29,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:29,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:29,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:29,334 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:29,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:29,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:29,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:29,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:29,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:29,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:29,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:29,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:57:29,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:30,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:30,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:30,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:30,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:30,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:30,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:30,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,018 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-12 19:57:30,018 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:30,018 INFO L518 ElimStorePlain]: Eliminatee v_prenex_201 vanished before elimination [2021-06-12 19:57:30,018 INFO L518 ElimStorePlain]: Eliminatee v_prenex_202 vanished before elimination [2021-06-12 19:57:30,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:30,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:30,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593991476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:30,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:30,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:30,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481994051] [2021-06-12 19:57:30,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:30,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:30,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:30,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:30,055 INFO L87 Difference]: Start difference. First operand 1116 states and 3198 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,111 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-12 19:57:31,347 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2021-06-12 19:57:31,576 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-12 19:57:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:31,888 INFO L93 Difference]: Finished difference Result 1180 states and 3324 transitions. [2021-06-12 19:57:31,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:57:31,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:31,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:31,890 INFO L225 Difference]: With dead ends: 1180 [2021-06-12 19:57:31,890 INFO L226 Difference]: Without dead ends: 1172 [2021-06-12 19:57:31,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 2287.4ms TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:57:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-06-12 19:57:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1122. [2021-06-12 19:57:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.8688670829616414) internal successors, (3216), 1121 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 3216 transitions. [2021-06-12 19:57:31,900 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 3216 transitions. Word has length 18 [2021-06-12 19:57:31,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:31,900 INFO L482 AbstractCegarLoop]: Abstraction has 1122 states and 3216 transitions. [2021-06-12 19:57:31,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:31,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 3216 transitions. [2021-06-12 19:57:31,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:31,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:31,901 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:32,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2549,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:32,101 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:32,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1402455932, now seen corresponding path program 352 times [2021-06-12 19:57:32,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:32,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790370527] [2021-06-12 19:57:32,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:32,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:32,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790370527] [2021-06-12 19:57:32,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790370527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:32,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424616121] [2021-06-12 19:57:32,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:32,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:32,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:32,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:32,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:57:33,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:33,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,246 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-06-12 19:57:33,246 INFO L518 ElimStorePlain]: Eliminatee v_prenex_209 vanished before elimination [2021-06-12 19:57:33,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:33,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:57:33,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:33,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:33,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:57:33,267 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:57:33,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:57:33,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:57:33,277 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-12 19:57:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:33,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424616121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:33,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:33,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 19:57:33,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284393770] [2021-06-12 19:57:33,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:57:33,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:33,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:57:33,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:33,301 INFO L87 Difference]: Start difference. First operand 1122 states and 3216 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,386 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 86 [2021-06-12 19:57:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:34,968 INFO L93 Difference]: Finished difference Result 1176 states and 3324 transitions. [2021-06-12 19:57:34,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:34,968 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:34,969 INFO L225 Difference]: With dead ends: 1176 [2021-06-12 19:57:34,970 INFO L226 Difference]: Without dead ends: 1173 [2021-06-12 19:57:34,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1983.7ms TimeCoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:57:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-12 19:57:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1123. [2021-06-12 19:57:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 2.8689839572192515) internal successors, (3219), 1122 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 3219 transitions. [2021-06-12 19:57:34,980 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 3219 transitions. Word has length 18 [2021-06-12 19:57:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:34,980 INFO L482 AbstractCegarLoop]: Abstraction has 1123 states and 3219 transitions. [2021-06-12 19:57:34,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 3219 transitions. [2021-06-12 19:57:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:34,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:34,981 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:35,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2569 [2021-06-12 19:57:35,181 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1956158810, now seen corresponding path program 353 times [2021-06-12 19:57:35,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:35,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752076697] [2021-06-12 19:57:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:35,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752076697] [2021-06-12 19:57:35,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752076697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131462047] [2021-06-12 19:57:35,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:35,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:57:35,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:35,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:35,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:35,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:35,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:35,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-12 19:57:35,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:35,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:35,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,882 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-12 19:57:35,882 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:35,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:35,883 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-12 19:57:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:35,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131462047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:35,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:35,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 19:57:35,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967522580] [2021-06-12 19:57:35,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:35,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:35,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:35,892 INFO L87 Difference]: Start difference. First operand 1123 states and 3219 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:36,377 INFO L93 Difference]: Finished difference Result 1166 states and 3305 transitions. [2021-06-12 19:57:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:57:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:36,378 INFO L225 Difference]: With dead ends: 1166 [2021-06-12 19:57:36,378 INFO L226 Difference]: Without dead ends: 1159 [2021-06-12 19:57:36,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:57:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-12 19:57:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1131. [2021-06-12 19:57:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.8628318584070795) internal successors, (3235), 1130 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 3235 transitions. [2021-06-12 19:57:36,392 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 3235 transitions. Word has length 18 [2021-06-12 19:57:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:36,392 INFO L482 AbstractCegarLoop]: Abstraction has 1131 states and 3235 transitions. [2021-06-12 19:57:36,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 3235 transitions. [2021-06-12 19:57:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:36,393 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:36,393 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:36,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2589 [2021-06-12 19:57:36,594 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:36,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:36,594 INFO L82 PathProgramCache]: Analyzing trace with hash -454160794, now seen corresponding path program 354 times [2021-06-12 19:57:36,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:36,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779127320] [2021-06-12 19:57:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:36,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:36,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779127320] [2021-06-12 19:57:36,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779127320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:36,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029194938] [2021-06-12 19:57:36,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:36,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:36,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:36,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:37,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:37,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:37,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-12 19:57:37,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:37,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:57:37,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,364 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-12 19:57:37,364 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:37,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:37,364 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-12 19:57:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:37,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029194938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:37,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:37,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 19:57:37,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452287716] [2021-06-12 19:57:37,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:37,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:37,373 INFO L87 Difference]: Start difference. First operand 1131 states and 3235 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:37,962 INFO L93 Difference]: Finished difference Result 1217 states and 3385 transitions. [2021-06-12 19:57:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:57:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:37,964 INFO L225 Difference]: With dead ends: 1217 [2021-06-12 19:57:37,964 INFO L226 Difference]: Without dead ends: 1207 [2021-06-12 19:57:37,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 929.2ms TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:57:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-12 19:57:37,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1153. [2021-06-12 19:57:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.859375) internal successors, (3294), 1152 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3294 transitions. [2021-06-12 19:57:37,978 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3294 transitions. Word has length 18 [2021-06-12 19:57:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:37,979 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3294 transitions. [2021-06-12 19:57:37,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3294 transitions. [2021-06-12 19:57:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:37,980 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:37,980 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:38,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2619 [2021-06-12 19:57:38,180 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash -206788058, now seen corresponding path program 355 times [2021-06-12 19:57:38,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:38,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831884412] [2021-06-12 19:57:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:38,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:38,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831884412] [2021-06-12 19:57:38,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831884412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:38,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517604591] [2021-06-12 19:57:38,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:38,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:39,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:39,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:39,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:39,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:39,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:57:39,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,300 INFO L628 ElimStorePlain]: treesize reduction 139, result has 7.3 percent of original size [2021-06-12 19:57:39,300 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:39,300 INFO L518 ElimStorePlain]: Eliminatee v_prenex_211 vanished before elimination [2021-06-12 19:57:39,300 INFO L518 ElimStorePlain]: Eliminatee v_prenex_212 vanished before elimination [2021-06-12 19:57:39,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:39,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:182, output treesize:11 [2021-06-12 19:57:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:39,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517604591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:39,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:39,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:39,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575236971] [2021-06-12 19:57:39,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:39,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:39,335 INFO L87 Difference]: Start difference. First operand 1153 states and 3294 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,229 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-06-12 19:57:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:40,452 INFO L93 Difference]: Finished difference Result 1167 states and 3321 transitions. [2021-06-12 19:57:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:57:40,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:40,454 INFO L225 Difference]: With dead ends: 1167 [2021-06-12 19:57:40,454 INFO L226 Difference]: Without dead ends: 1164 [2021-06-12 19:57:40,454 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1715.6ms TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:57:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-12 19:57:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1153. [2021-06-12 19:57:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 2.859375) internal successors, (3294), 1152 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 3294 transitions. [2021-06-12 19:57:40,468 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 3294 transitions. Word has length 18 [2021-06-12 19:57:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:40,468 INFO L482 AbstractCegarLoop]: Abstraction has 1153 states and 3294 transitions. [2021-06-12 19:57:40,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:40,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 3294 transitions. [2021-06-12 19:57:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:40,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:40,469 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:40,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2650,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:40,670 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:40,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash 207374476, now seen corresponding path program 356 times [2021-06-12 19:57:40,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:40,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276595000] [2021-06-12 19:57:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:40,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:40,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276595000] [2021-06-12 19:57:40,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276595000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:40,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104510745] [2021-06-12 19:57:40,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:40,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:40,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:40,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:41,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:57:41,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:57:41,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:41,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:41,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-06-12 19:57:41,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,640 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-12 19:57:41,640 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:41,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:41,640 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:182, output treesize:11 [2021-06-12 19:57:41,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:41,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104510745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:41,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:41,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:41,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075764823] [2021-06-12 19:57:41,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:41,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:41,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:41,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:41,670 INFO L87 Difference]: Start difference. First operand 1153 states and 3294 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:42,705 INFO L93 Difference]: Finished difference Result 1228 states and 3438 transitions. [2021-06-12 19:57:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:57:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:42,707 INFO L225 Difference]: With dead ends: 1228 [2021-06-12 19:57:42,707 INFO L226 Difference]: Without dead ends: 1225 [2021-06-12 19:57:42,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1510.0ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:57:42,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-12 19:57:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1172. [2021-06-12 19:57:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.8659265584970113) internal successors, (3356), 1171 states have internal predecessors, (3356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 3356 transitions. [2021-06-12 19:57:42,717 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 3356 transitions. Word has length 18 [2021-06-12 19:57:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:42,717 INFO L482 AbstractCegarLoop]: Abstraction has 1172 states and 3356 transitions. [2021-06-12 19:57:42,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 3356 transitions. [2021-06-12 19:57:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:42,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:42,718 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:42,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2669 [2021-06-12 19:57:42,918 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash 215104874, now seen corresponding path program 357 times [2021-06-12 19:57:42,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:42,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273907221] [2021-06-12 19:57:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:57:43,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:43,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273907221] [2021-06-12 19:57:43,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273907221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885138974] [2021-06-12 19:57:43,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:43,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:57:43,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:43,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:57:43,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:43,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:43,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:57:43,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,753 INFO L628 ElimStorePlain]: treesize reduction 108, result has 9.2 percent of original size [2021-06-12 19:57:43,753 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:43,753 INFO L518 ElimStorePlain]: Eliminatee v_prenex_214 vanished before elimination [2021-06-12 19:57:43,753 INFO L518 ElimStorePlain]: Eliminatee v_prenex_215 vanished before elimination [2021-06-12 19:57:43,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:43,754 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-12 19:57:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:43,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885138974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:43,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:43,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 19:57:43,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454741647] [2021-06-12 19:57:43,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:57:43,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:43,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:57:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:57:43,763 INFO L87 Difference]: Start difference. First operand 1172 states and 3356 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:44,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:44,233 INFO L93 Difference]: Finished difference Result 1280 states and 3562 transitions. [2021-06-12 19:57:44,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:57:44,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:44,235 INFO L225 Difference]: With dead ends: 1280 [2021-06-12 19:57:44,235 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 19:57:44,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 865.3ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:57:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 19:57:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1203. [2021-06-12 19:57:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.866056572379368) internal successors, (3445), 1202 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3445 transitions. [2021-06-12 19:57:44,246 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3445 transitions. Word has length 18 [2021-06-12 19:57:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:44,246 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 3445 transitions. [2021-06-12 19:57:44,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3445 transitions. [2021-06-12 19:57:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:44,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:44,247 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:44,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:44,447 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1274300122, now seen corresponding path program 358 times [2021-06-12 19:57:44,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:44,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133770853] [2021-06-12 19:57:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:44,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:44,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133770853] [2021-06-12 19:57:44,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133770853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:44,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497477721] [2021-06-12 19:57:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:44,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:57:44,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:44,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:44,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:45,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:45,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:45,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:45,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:45,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:45,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:45,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:57:45,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,509 INFO L628 ElimStorePlain]: treesize reduction 147, result has 7.0 percent of original size [2021-06-12 19:57:45,509 INFO L518 ElimStorePlain]: Eliminatee v_prenex_218 vanished before elimination [2021-06-12 19:57:45,509 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:57:45,509 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:45,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:45,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-12 19:57:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:45,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497477721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:45,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:45,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:57:45,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442213782] [2021-06-12 19:57:45,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:57:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:45,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:57:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:57:45,545 INFO L87 Difference]: Start difference. First operand 1203 states and 3445 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:46,590 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-12 19:57:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:47,004 INFO L93 Difference]: Finished difference Result 1294 states and 3628 transitions. [2021-06-12 19:57:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:57:47,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:47,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:47,005 INFO L225 Difference]: With dead ends: 1294 [2021-06-12 19:57:47,005 INFO L226 Difference]: Without dead ends: 1288 [2021-06-12 19:57:47,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1852.6ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:57:47,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-06-12 19:57:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1215. [2021-06-12 19:57:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 2.8739703459637562) internal successors, (3489), 1214 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3489 transitions. [2021-06-12 19:57:47,017 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3489 transitions. Word has length 18 [2021-06-12 19:57:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:47,017 INFO L482 AbstractCegarLoop]: Abstraction has 1215 states and 3489 transitions. [2021-06-12 19:57:47,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3489 transitions. [2021-06-12 19:57:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:47,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:47,018 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:47,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2713,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:47,218 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:47,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1080521118, now seen corresponding path program 359 times [2021-06-12 19:57:47,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:47,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604116841] [2021-06-12 19:57:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:57:47,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:47,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604116841] [2021-06-12 19:57:47,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604116841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:47,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375112780] [2021-06-12 19:57:47,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:47,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:57:47,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:47,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:47,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:47,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:47,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:57:47,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:48,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:48,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:48,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:48,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,015 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-12 19:57:48,015 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:48,015 INFO L518 ElimStorePlain]: Eliminatee v_prenex_220 vanished before elimination [2021-06-12 19:57:48,016 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-06-12 19:57:48,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:48,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:48,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375112780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:48,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:48,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:57:48,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654433568] [2021-06-12 19:57:48,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:57:48,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:48,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:57:48,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:57:48,043 INFO L87 Difference]: Start difference. First operand 1215 states and 3489 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:48,738 INFO L93 Difference]: Finished difference Result 1295 states and 3647 transitions. [2021-06-12 19:57:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:57:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:48,740 INFO L225 Difference]: With dead ends: 1295 [2021-06-12 19:57:48,740 INFO L226 Difference]: Without dead ends: 1291 [2021-06-12 19:57:48,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 956.6ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:57:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-06-12 19:57:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1238. [2021-06-12 19:57:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.8746968472109944) internal successors, (3556), 1237 states have internal predecessors, (3556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3556 transitions. [2021-06-12 19:57:48,756 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3556 transitions. Word has length 18 [2021-06-12 19:57:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:48,756 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 3556 transitions. [2021-06-12 19:57:48,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3556 transitions. [2021-06-12 19:57:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:48,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:48,757 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:48,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2732 [2021-06-12 19:57:48,958 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash -7435738, now seen corresponding path program 360 times [2021-06-12 19:57:48,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:48,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999074873] [2021-06-12 19:57:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:49,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999074873] [2021-06-12 19:57:49,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999074873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122188865] [2021-06-12 19:57:49,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:49,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:57:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:49,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:49,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:49,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:49,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:49,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:49,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:49,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:49,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:49,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:49,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:49,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,879 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-12 19:57:49,879 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:57:49,879 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:49,879 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-06-12 19:57:49,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:49,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:49,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:49,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122188865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:49,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:49,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:57:49,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097036933] [2021-06-12 19:57:49,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:57:49,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:49,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:57:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:57:49,909 INFO L87 Difference]: Start difference. First operand 1238 states and 3556 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:50,840 INFO L93 Difference]: Finished difference Result 1375 states and 3810 transitions. [2021-06-12 19:57:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:50,841 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:50,842 INFO L225 Difference]: With dead ends: 1375 [2021-06-12 19:57:50,842 INFO L226 Difference]: Without dead ends: 1366 [2021-06-12 19:57:50,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1247.5ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:57:50,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-06-12 19:57:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 1253. [2021-06-12 19:57:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.876996805111821) internal successors, (3602), 1252 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3602 transitions. [2021-06-12 19:57:50,854 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3602 transitions. Word has length 18 [2021-06-12 19:57:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:50,854 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3602 transitions. [2021-06-12 19:57:50,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:50,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3602 transitions. [2021-06-12 19:57:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:50,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:50,855 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:51,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2751 [2021-06-12 19:57:51,055 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:51,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2113335308, now seen corresponding path program 361 times [2021-06-12 19:57:51,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:51,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154765920] [2021-06-12 19:57:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:51,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:51,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154765920] [2021-06-12 19:57:51,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154765920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:51,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851385740] [2021-06-12 19:57:51,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:51,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:51,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:52,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:57:52,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:52,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:52,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:57:52,278 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:52,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:52,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:57:52,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,297 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-12 19:57:52,297 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:52,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:52,297 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-12 19:57:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:52,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851385740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:52,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:52,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:52,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588606858] [2021-06-12 19:57:52,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:52,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:52,329 INFO L87 Difference]: Start difference. First operand 1253 states and 3602 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,461 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 73 [2021-06-12 19:57:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:53,731 INFO L93 Difference]: Finished difference Result 1373 states and 3845 transitions. [2021-06-12 19:57:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:57:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:53,733 INFO L225 Difference]: With dead ends: 1373 [2021-06-12 19:57:53,733 INFO L226 Difference]: Without dead ends: 1367 [2021-06-12 19:57:53,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1985.5ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:57:53,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-06-12 19:57:53,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1287. [2021-06-12 19:57:53,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.8833592534992225) internal successors, (3708), 1286 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3708 transitions. [2021-06-12 19:57:53,749 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3708 transitions. Word has length 18 [2021-06-12 19:57:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:53,749 INFO L482 AbstractCegarLoop]: Abstraction has 1287 states and 3708 transitions. [2021-06-12 19:57:53,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:53,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3708 transitions. [2021-06-12 19:57:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:53,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:53,750 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:53,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2770,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:53,951 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:53,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:53,951 INFO L82 PathProgramCache]: Analyzing trace with hash 631660710, now seen corresponding path program 362 times [2021-06-12 19:57:53,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:53,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140147665] [2021-06-12 19:57:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:54,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:54,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:54,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140147665] [2021-06-12 19:57:54,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140147665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:54,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860466475] [2021-06-12 19:57:54,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:54,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:57:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:54,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:54,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:55,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:55,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:55,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:55,186 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-12 19:57:55,186 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:55,186 INFO L518 ElimStorePlain]: Eliminatee v_prenex_230 vanished before elimination [2021-06-12 19:57:55,186 INFO L518 ElimStorePlain]: Eliminatee v_prenex_231 vanished before elimination [2021-06-12 19:57:55,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:55,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:55,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860466475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:55,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:55,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:55,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544179620] [2021-06-12 19:57:55,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:55,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:55,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:55,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:55,221 INFO L87 Difference]: Start difference. First operand 1287 states and 3708 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,477 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2021-06-12 19:57:56,674 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-06-12 19:57:56,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:57:56,975 INFO L93 Difference]: Finished difference Result 1347 states and 3831 transitions. [2021-06-12 19:57:56,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:57:56,976 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:57:56,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:57:56,977 INFO L225 Difference]: With dead ends: 1347 [2021-06-12 19:57:56,977 INFO L226 Difference]: Without dead ends: 1339 [2021-06-12 19:57:56,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2370.1ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:57:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1339 states. [2021-06-12 19:57:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1339 to 1304. [2021-06-12 19:57:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 2.8848810437452035) internal successors, (3759), 1303 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 3759 transitions. [2021-06-12 19:57:56,989 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 3759 transitions. Word has length 18 [2021-06-12 19:57:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:57:56,989 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 3759 transitions. [2021-06-12 19:57:56,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 3759 transitions. [2021-06-12 19:57:56,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:57:56,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:57:56,990 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:57:57,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2795,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:57,190 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:57:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:57:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1704746090, now seen corresponding path program 363 times [2021-06-12 19:57:57,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:57:57,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968058288] [2021-06-12 19:57:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:57:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:57:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:57,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:57:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968058288] [2021-06-12 19:57:57,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968058288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:57,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444114210] [2021-06-12 19:57:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:57:57,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:57:57,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:57:57,835 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:57:57,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:57:58,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:58,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:58,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:57:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:58,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:57:58,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:57:58,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,539 INFO L628 ElimStorePlain]: treesize reduction 151, result has 6.8 percent of original size [2021-06-12 19:57:58,539 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:57:58,539 INFO L518 ElimStorePlain]: Eliminatee v_prenex_237 vanished before elimination [2021-06-12 19:57:58,539 INFO L518 ElimStorePlain]: Eliminatee v_prenex_238 vanished before elimination [2021-06-12 19:57:58,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:57:58,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:57:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:57:58,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444114210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:57:58,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:57:58,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:57:58,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471070875] [2021-06-12 19:57:58,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:57:58,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:57:58,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:57:58,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:57:58,577 INFO L87 Difference]: Start difference. First operand 1304 states and 3759 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:57:59,757 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-12 19:58:00,087 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2021-06-12 19:58:00,332 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 98 [2021-06-12 19:58:00,746 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-12 19:58:00,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:00,762 INFO L93 Difference]: Finished difference Result 1362 states and 3871 transitions. [2021-06-12 19:58:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:58:00,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:00,763 INFO L225 Difference]: With dead ends: 1362 [2021-06-12 19:58:00,763 INFO L226 Difference]: Without dead ends: 1354 [2021-06-12 19:58:00,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2742.9ms TimeCoverageRelationStatistics Valid=141, Invalid=1265, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:58:00,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-12 19:58:00,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1314. [2021-06-12 19:58:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 2.884996191926885) internal successors, (3788), 1313 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 3788 transitions. [2021-06-12 19:58:00,780 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 3788 transitions. Word has length 18 [2021-06-12 19:58:00,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:00,780 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 3788 transitions. [2021-06-12 19:58:00,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:00,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 3788 transitions. [2021-06-12 19:58:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:00,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:00,781 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:00,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2814 [2021-06-12 19:58:00,982 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:00,982 INFO L82 PathProgramCache]: Analyzing trace with hash 610654502, now seen corresponding path program 364 times [2021-06-12 19:58:00,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:00,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823701895] [2021-06-12 19:58:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823701895] [2021-06-12 19:58:01,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823701895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020255876] [2021-06-12 19:58:01,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:01,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:01,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:01,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:01,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:01,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:01,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:01,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:01,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,815 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-12 19:58:01,815 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:01,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-06-12 19:58:01,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_247 vanished before elimination [2021-06-12 19:58:01,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:01,815 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:01,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020255876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:01,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:01,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-12 19:58:01,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877963772] [2021-06-12 19:58:01,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:58:01,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:58:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:01,825 INFO L87 Difference]: Start difference. First operand 1314 states and 3788 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:02,722 INFO L93 Difference]: Finished difference Result 1470 states and 4103 transitions. [2021-06-12 19:58:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:58:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:02,724 INFO L225 Difference]: With dead ends: 1470 [2021-06-12 19:58:02,724 INFO L226 Difference]: Without dead ends: 1467 [2021-06-12 19:58:02,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1094.6ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:58:02,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2021-06-12 19:58:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1343. [2021-06-12 19:58:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 2.8934426229508197) internal successors, (3883), 1342 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 3883 transitions. [2021-06-12 19:58:02,737 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 3883 transitions. Word has length 18 [2021-06-12 19:58:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:02,737 INFO L482 AbstractCegarLoop]: Abstraction has 1343 states and 3883 transitions. [2021-06-12 19:58:02,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 3883 transitions. [2021-06-12 19:58:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:02,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:02,738 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:02,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2831,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:02,953 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:02,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1500373930, now seen corresponding path program 365 times [2021-06-12 19:58:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:02,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233236146] [2021-06-12 19:58:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:03,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:03,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233236146] [2021-06-12 19:58:03,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233236146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:03,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449382353] [2021-06-12 19:58:03,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:03,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:03,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:03,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:04,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:04,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:04,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:04,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,133 INFO L628 ElimStorePlain]: treesize reduction 116, result has 8.7 percent of original size [2021-06-12 19:58:04,133 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:04,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_252 vanished before elimination [2021-06-12 19:58:04,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_253 vanished before elimination [2021-06-12 19:58:04,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:04,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:04,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449382353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:04,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:04,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:58:04,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34130866] [2021-06-12 19:58:04,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:04,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:04,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:04,166 INFO L87 Difference]: Start difference. First operand 1343 states and 3883 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:05,261 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2021-06-12 19:58:05,542 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2021-06-12 19:58:05,786 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-12 19:58:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:05,997 INFO L93 Difference]: Finished difference Result 2052 states and 5791 transitions. [2021-06-12 19:58:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:58:05,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:05,999 INFO L225 Difference]: With dead ends: 2052 [2021-06-12 19:58:05,999 INFO L226 Difference]: Without dead ends: 2049 [2021-06-12 19:58:06,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2028.6ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:58:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-12 19:58:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1345. [2021-06-12 19:58:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.8921130952380953) internal successors, (3887), 1344 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3887 transitions. [2021-06-12 19:58:06,013 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3887 transitions. Word has length 18 [2021-06-12 19:58:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:06,014 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 3887 transitions. [2021-06-12 19:58:06,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3887 transitions. [2021-06-12 19:58:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:06,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:06,015 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:06,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2848,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:06,215 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:06,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:06,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1798426888, now seen corresponding path program 366 times [2021-06-12 19:58:06,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:06,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933746171] [2021-06-12 19:58:06,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:06,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:06,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933746171] [2021-06-12 19:58:06,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933746171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:06,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562631059] [2021-06-12 19:58:06,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:06,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:58:06,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:06,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:07,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:07,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:07,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:07,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:07,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:07,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:07,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,188 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-12 19:58:07,188 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:07,188 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-06-12 19:58:07,188 INFO L518 ElimStorePlain]: Eliminatee v_prenex_259 vanished before elimination [2021-06-12 19:58:07,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:07,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:07,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562631059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:07,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:07,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 19:58:07,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332746100] [2021-06-12 19:58:07,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:07,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:07,197 INFO L87 Difference]: Start difference. First operand 1345 states and 3887 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:07,985 INFO L93 Difference]: Finished difference Result 1586 states and 4489 transitions. [2021-06-12 19:58:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:58:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:07,987 INFO L225 Difference]: With dead ends: 1586 [2021-06-12 19:58:07,987 INFO L226 Difference]: Without dead ends: 1583 [2021-06-12 19:58:07,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1168.4ms TimeCoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-06-12 19:58:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1345. [2021-06-12 19:58:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 2.8921130952380953) internal successors, (3887), 1344 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 3887 transitions. [2021-06-12 19:58:08,000 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 3887 transitions. Word has length 18 [2021-06-12 19:58:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:08,000 INFO L482 AbstractCegarLoop]: Abstraction has 1345 states and 3887 transitions. [2021-06-12 19:58:08,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 3887 transitions. [2021-06-12 19:58:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:08,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:08,001 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:08,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2867 [2021-06-12 19:58:08,201 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:08,202 INFO L82 PathProgramCache]: Analyzing trace with hash 166479722, now seen corresponding path program 367 times [2021-06-12 19:58:08,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:08,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975865765] [2021-06-12 19:58:08,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:08,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:08,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975865765] [2021-06-12 19:58:08,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975865765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:08,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477759503] [2021-06-12 19:58:08,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:08,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:08,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:09,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:09,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:09,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,491 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.6 percent of original size [2021-06-12 19:58:09,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:09,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:58:09,494 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:09,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-12 19:58:09,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:09,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:09,525 INFO L518 ElimStorePlain]: Eliminatee v_prenex_265 vanished before elimination [2021-06-12 19:58:09,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:09,526 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-12 19:58:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:09,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477759503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:09,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:09,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:58:09,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922340575] [2021-06-12 19:58:09,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:58:09,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:09,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:58:09,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:09,565 INFO L87 Difference]: Start difference. First operand 1345 states and 3887 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:10,350 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-12 19:58:10,518 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2021-06-12 19:58:10,726 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-12 19:58:10,907 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2021-06-12 19:58:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:11,556 INFO L93 Difference]: Finished difference Result 1603 states and 4518 transitions. [2021-06-12 19:58:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:58:11,557 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:11,558 INFO L225 Difference]: With dead ends: 1603 [2021-06-12 19:58:11,558 INFO L226 Difference]: Without dead ends: 1594 [2021-06-12 19:58:11,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2395.4ms TimeCoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:58:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-12 19:58:11,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1353. [2021-06-12 19:58:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 2.8920118343195265) internal successors, (3910), 1352 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3910 transitions. [2021-06-12 19:58:11,571 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3910 transitions. Word has length 18 [2021-06-12 19:58:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:11,571 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 3910 transitions. [2021-06-12 19:58:11,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3910 transitions. [2021-06-12 19:58:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:11,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:11,572 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:11,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2886,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:11,773 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash -994542392, now seen corresponding path program 368 times [2021-06-12 19:58:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:11,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748122740] [2021-06-12 19:58:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:12,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:12,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748122740] [2021-06-12 19:58:12,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748122740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251229256] [2021-06-12 19:58:12,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:12,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:12,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:12,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:12,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:12,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:12,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:12,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:12,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,809 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-12 19:58:12,809 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:12,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_267 vanished before elimination [2021-06-12 19:58:12,809 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-06-12 19:58:12,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:12,809 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:12,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:12,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251229256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:12,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:12,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:58:12,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159223392] [2021-06-12 19:58:12,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:58:12,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:12,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:58:12,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:12,837 INFO L87 Difference]: Start difference. First operand 1353 states and 3910 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:14,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:14,249 INFO L93 Difference]: Finished difference Result 1627 states and 4563 transitions. [2021-06-12 19:58:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:58:14,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:14,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:14,251 INFO L225 Difference]: With dead ends: 1627 [2021-06-12 19:58:14,251 INFO L226 Difference]: Without dead ends: 1618 [2021-06-12 19:58:14,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1613.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:58:14,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2021-06-12 19:58:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1349. [2021-06-12 19:58:14,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 2.8939169139465877) internal successors, (3901), 1348 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:14,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 3901 transitions. [2021-06-12 19:58:14,265 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 3901 transitions. Word has length 18 [2021-06-12 19:58:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:14,265 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 3901 transitions. [2021-06-12 19:58:14,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 3901 transitions. [2021-06-12 19:58:14,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:14,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:14,266 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:14,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2906,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:14,466 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:14,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:14,467 INFO L82 PathProgramCache]: Analyzing trace with hash -754900054, now seen corresponding path program 369 times [2021-06-12 19:58:14,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:14,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50797044] [2021-06-12 19:58:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:14,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:14,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50797044] [2021-06-12 19:58:14,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50797044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:14,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850422741] [2021-06-12 19:58:14,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:14,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:14,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:14,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:15,469 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 19:58:15,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:15,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:15,651 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,712 INFO L628 ElimStorePlain]: treesize reduction 174, result has 33.8 percent of original size [2021-06-12 19:58:15,712 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:58:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:15,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-12 19:58:15,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:15,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,734 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:15,735 INFO L518 ElimStorePlain]: Eliminatee v_prenex_273 vanished before elimination [2021-06-12 19:58:15,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:15,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:58:15,738 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:15,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:15,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:58:15,753 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:352, output treesize:31 [2021-06-12 19:58:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:15,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850422741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:15,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:15,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:58:15,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327508396] [2021-06-12 19:58:15,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:58:15,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:15,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:58:15,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:15,789 INFO L87 Difference]: Start difference. First operand 1349 states and 3901 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,779 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 19:58:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:16,958 INFO L93 Difference]: Finished difference Result 1668 states and 4648 transitions. [2021-06-12 19:58:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:58:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:16,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:16,960 INFO L225 Difference]: With dead ends: 1668 [2021-06-12 19:58:16,961 INFO L226 Difference]: Without dead ends: 1661 [2021-06-12 19:58:16,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1619.3ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:58:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-12 19:58:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1359. [2021-06-12 19:58:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.901325478645066) internal successors, (3940), 1358 states have internal predecessors, (3940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3940 transitions. [2021-06-12 19:58:16,981 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3940 transitions. Word has length 18 [2021-06-12 19:58:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:16,981 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 3940 transitions. [2021-06-12 19:58:16,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3940 transitions. [2021-06-12 19:58:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:16,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:16,982 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:17,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2925 [2021-06-12 19:58:17,184 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -747169656, now seen corresponding path program 370 times [2021-06-12 19:58:17,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:17,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008673010] [2021-06-12 19:58:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:17,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:17,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:17,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008673010] [2021-06-12 19:58:17,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008673010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:17,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923719311] [2021-06-12 19:58:17,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:17,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:17,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:17,425 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:58:18,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:18,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:18,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:18,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:18,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,071 INFO L628 ElimStorePlain]: treesize reduction 76, result has 12.6 percent of original size [2021-06-12 19:58:18,071 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:18,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:18,072 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-12 19:58:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:18,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923719311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:18,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:18,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:58:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526544937] [2021-06-12 19:58:18,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:18,100 INFO L87 Difference]: Start difference. First operand 1359 states and 3940 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:19,534 INFO L93 Difference]: Finished difference Result 1670 states and 4656 transitions. [2021-06-12 19:58:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:58:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:19,537 INFO L225 Difference]: With dead ends: 1670 [2021-06-12 19:58:19,537 INFO L226 Difference]: Without dead ends: 1666 [2021-06-12 19:58:19,538 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1647.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:58:19,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1666 states. [2021-06-12 19:58:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1666 to 1322. [2021-06-12 19:58:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.9084027252081754) internal successors, (3842), 1321 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 3842 transitions. [2021-06-12 19:58:19,552 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 3842 transitions. Word has length 18 [2021-06-12 19:58:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:19,552 INFO L482 AbstractCegarLoop]: Abstraction has 1322 states and 3842 transitions. [2021-06-12 19:58:19,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 3842 transitions. [2021-06-12 19:58:19,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:19,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:19,553 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:19,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2965,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:19,754 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:19,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:19,754 INFO L82 PathProgramCache]: Analyzing trace with hash -806597504, now seen corresponding path program 371 times [2021-06-12 19:58:19,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:19,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231730584] [2021-06-12 19:58:19,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:20,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231730584] [2021-06-12 19:58:20,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231730584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213163309] [2021-06-12 19:58:20,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:20,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:58:20,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:20,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:20,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:20,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:20,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:20,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,836 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-12 19:58:20,836 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:20,836 INFO L518 ElimStorePlain]: Eliminatee v_prenex_277 vanished before elimination [2021-06-12 19:58:20,836 INFO L518 ElimStorePlain]: Eliminatee v_prenex_278 vanished before elimination [2021-06-12 19:58:20,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:20,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:20,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213163309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:20,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:20,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:58:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608620390] [2021-06-12 19:58:20,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:20,864 INFO L87 Difference]: Start difference. First operand 1322 states and 3842 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:21,652 INFO L93 Difference]: Finished difference Result 1425 states and 4085 transitions. [2021-06-12 19:58:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:58:21,653 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:21,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:21,655 INFO L225 Difference]: With dead ends: 1425 [2021-06-12 19:58:21,655 INFO L226 Difference]: Without dead ends: 1418 [2021-06-12 19:58:21,655 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1223.6ms TimeCoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:58:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-12 19:58:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1325. [2021-06-12 19:58:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.906344410876133) internal successors, (3848), 1324 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3848 transitions. [2021-06-12 19:58:21,668 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3848 transitions. Word has length 18 [2021-06-12 19:58:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:21,668 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3848 transitions. [2021-06-12 19:58:21,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3848 transitions. [2021-06-12 19:58:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:21,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:21,670 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:21,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2995 [2021-06-12 19:58:21,870 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:21,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:21,871 INFO L82 PathProgramCache]: Analyzing trace with hash 695400512, now seen corresponding path program 372 times [2021-06-12 19:58:21,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:21,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833662986] [2021-06-12 19:58:21,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:22,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833662986] [2021-06-12 19:58:22,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833662986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:22,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863841727] [2021-06-12 19:58:22,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:22,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:58:22,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:22,164 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:22,746 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-12 19:58:22,947 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 93 [2021-06-12 19:58:23,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:58:23,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,097 INFO L628 ElimStorePlain]: treesize reduction 277, result has 3.8 percent of original size [2021-06-12 19:58:23,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_291 vanished before elimination [2021-06-12 19:58:23,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_292 vanished before elimination [2021-06-12 19:58:23,097 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:58:23,097 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:23,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-12 19:58:23,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_285 vanished before elimination [2021-06-12 19:58:23,097 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-06-12 19:58:23,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_287 vanished before elimination [2021-06-12 19:58:23,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-06-12 19:58:23,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 10 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:23,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 15 variables, input treesize:360, output treesize:11 [2021-06-12 19:58:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:23,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863841727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:23,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:23,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 19:58:23,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499957911] [2021-06-12 19:58:23,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:23,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:23,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:23,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:23,107 INFO L87 Difference]: Start difference. First operand 1325 states and 3848 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:24,034 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-06-12 19:58:24,205 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 101 [2021-06-12 19:58:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:24,300 INFO L93 Difference]: Finished difference Result 1437 states and 4095 transitions. [2021-06-12 19:58:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:58:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:24,301 INFO L225 Difference]: With dead ends: 1437 [2021-06-12 19:58:24,301 INFO L226 Difference]: Without dead ends: 1432 [2021-06-12 19:58:24,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1599.6ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-06-12 19:58:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1325. [2021-06-12 19:58:24,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.906344410876133) internal successors, (3848), 1324 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:24,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3848 transitions. [2021-06-12 19:58:24,314 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3848 transitions. Word has length 18 [2021-06-12 19:58:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:24,314 INFO L482 AbstractCegarLoop]: Abstraction has 1325 states and 3848 transitions. [2021-06-12 19:58:24,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:24,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3848 transitions. [2021-06-12 19:58:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:24,320 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:24,320 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:24,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:24,521 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash 935042850, now seen corresponding path program 373 times [2021-06-12 19:58:24,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:24,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080385593] [2021-06-12 19:58:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:24,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:24,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080385593] [2021-06-12 19:58:24,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080385593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:24,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408209437] [2021-06-12 19:58:24,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:24,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:24,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:25,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:25,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:25,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:25,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:25,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,454 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-12 19:58:25,454 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:25,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_295 vanished before elimination [2021-06-12 19:58:25,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_296 vanished before elimination [2021-06-12 19:58:25,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:25,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:25,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408209437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:25,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:25,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:58:25,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402036485] [2021-06-12 19:58:25,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:25,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:25,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:25,481 INFO L87 Difference]: Start difference. First operand 1325 states and 3848 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:26,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:26,405 INFO L93 Difference]: Finished difference Result 1489 states and 4198 transitions. [2021-06-12 19:58:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:58:26,405 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:26,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:26,407 INFO L225 Difference]: With dead ends: 1489 [2021-06-12 19:58:26,407 INFO L226 Difference]: Without dead ends: 1485 [2021-06-12 19:58:26,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1298.9ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-06-12 19:58:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1342. [2021-06-12 19:58:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.9157345264727814) internal successors, (3910), 1341 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 3910 transitions. [2021-06-12 19:58:26,419 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 3910 transitions. Word has length 18 [2021-06-12 19:58:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:26,419 INFO L482 AbstractCegarLoop]: Abstraction has 1342 states and 3910 transitions. [2021-06-12 19:58:26,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 3910 transitions. [2021-06-12 19:58:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:26,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:26,421 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:26,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:26,621 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 942773248, now seen corresponding path program 374 times [2021-06-12 19:58:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:26,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175850302] [2021-06-12 19:58:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:26,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:26,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175850302] [2021-06-12 19:58:26,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175850302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:26,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180390682] [2021-06-12 19:58:26,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:26,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:26,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:26,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:27,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:27,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-12 19:58:27,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:58:27,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:27,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:27,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:27,536 INFO L628 ElimStorePlain]: treesize reduction 109, result has 40.1 percent of original size [2021-06-12 19:58:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:27,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:58:27,540 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:27,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:27,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:27,567 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:345, output treesize:56 [2021-06-12 19:58:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:27,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180390682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:27,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:27,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 19:58:27,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594900785] [2021-06-12 19:58:27,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:27,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:27,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:27,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:27,660 INFO L87 Difference]: Start difference. First operand 1342 states and 3910 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:28,542 INFO L93 Difference]: Finished difference Result 1512 states and 4276 transitions. [2021-06-12 19:58:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:58:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:28,544 INFO L225 Difference]: With dead ends: 1512 [2021-06-12 19:58:28,544 INFO L226 Difference]: Without dead ends: 1506 [2021-06-12 19:58:28,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1116.9ms TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:58:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-06-12 19:58:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1337. [2021-06-12 19:58:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 2.9154191616766467) internal successors, (3895), 1336 states have internal predecessors, (3895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 3895 transitions. [2021-06-12 19:58:28,556 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 3895 transitions. Word has length 18 [2021-06-12 19:58:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:28,557 INFO L482 AbstractCegarLoop]: Abstraction has 1337 states and 3895 transitions. [2021-06-12 19:58:28,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 3895 transitions. [2021-06-12 19:58:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:28,558 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:28,558 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:28,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3054,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:28,758 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:28,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1995645530, now seen corresponding path program 375 times [2021-06-12 19:58:28,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:28,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898043127] [2021-06-12 19:58:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:29,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:29,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898043127] [2021-06-12 19:58:29,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898043127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:29,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829717024] [2021-06-12 19:58:29,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:29,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:29,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:29,302 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:29,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:29,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:30,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:30,016 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,058 INFO L628 ElimStorePlain]: treesize reduction 95, result has 46.6 percent of original size [2021-06-12 19:58:30,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:30,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:58:30,062 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:30,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2021-06-12 19:58:30,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:30,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:30,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-06-12 19:58:30,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:30,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-12 19:58:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:30,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829717024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:30,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:30,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:58:30,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647608353] [2021-06-12 19:58:30,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:58:30,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:58:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:30,133 INFO L87 Difference]: Start difference. First operand 1337 states and 3895 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:31,984 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2021-06-12 19:58:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:32,191 INFO L93 Difference]: Finished difference Result 1452 states and 4160 transitions. [2021-06-12 19:58:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:58:32,191 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:32,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:32,192 INFO L225 Difference]: With dead ends: 1452 [2021-06-12 19:58:32,192 INFO L226 Difference]: Without dead ends: 1439 [2021-06-12 19:58:32,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 2475.9ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:58:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2021-06-12 19:58:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 1339. [2021-06-12 19:58:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1339 states, 1338 states have (on average 2.914050822122571) internal successors, (3899), 1338 states have internal predecessors, (3899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 3899 transitions. [2021-06-12 19:58:32,205 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 3899 transitions. Word has length 18 [2021-06-12 19:58:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:32,205 INFO L482 AbstractCegarLoop]: Abstraction has 1339 states and 3899 transitions. [2021-06-12 19:58:32,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 3899 transitions. [2021-06-12 19:58:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:32,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:32,206 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:32,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-06-12 19:58:32,407 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash 44208064, now seen corresponding path program 376 times [2021-06-12 19:58:32,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:32,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389381334] [2021-06-12 19:58:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:32,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:32,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:32,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389381334] [2021-06-12 19:58:32,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389381334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:32,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227557652] [2021-06-12 19:58:32,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:32,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:32,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:32,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:32,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:33,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:33,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:33,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:33,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,476 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-12 19:58:33,476 INFO L518 ElimStorePlain]: Eliminatee v_prenex_308 vanished before elimination [2021-06-12 19:58:33,476 INFO L518 ElimStorePlain]: Eliminatee v_prenex_309 vanished before elimination [2021-06-12 19:58:33,476 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:33,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:33,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:33,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227557652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:33,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:33,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:58:33,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558233742] [2021-06-12 19:58:33,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:33,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:33,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:33,509 INFO L87 Difference]: Start difference. First operand 1339 states and 3899 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:34,764 INFO L93 Difference]: Finished difference Result 1529 states and 4308 transitions. [2021-06-12 19:58:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:58:34,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:34,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:34,766 INFO L225 Difference]: With dead ends: 1529 [2021-06-12 19:58:34,766 INFO L226 Difference]: Without dead ends: 1514 [2021-06-12 19:58:34,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 1651.5ms TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:58:34,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2021-06-12 19:58:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1367. [2021-06-12 19:58:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 2.9128843338213763) internal successors, (3979), 1366 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 3979 transitions. [2021-06-12 19:58:34,779 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 3979 transitions. Word has length 18 [2021-06-12 19:58:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:34,779 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 3979 transitions. [2021-06-12 19:58:34,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 3979 transitions. [2021-06-12 19:58:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:34,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:34,781 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:34,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3096 [2021-06-12 19:58:34,981 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:34,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1356935782, now seen corresponding path program 377 times [2021-06-12 19:58:34,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:34,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775558395] [2021-06-12 19:58:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:35,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775558395] [2021-06-12 19:58:35,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775558395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038809006] [2021-06-12 19:58:35,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:35,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:35,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:35,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:35,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:35,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:35,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:35,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:35,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:58:35,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:36,007 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-12 19:58:36,007 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:36,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_311 vanished before elimination [2021-06-12 19:58:36,007 INFO L518 ElimStorePlain]: Eliminatee v_prenex_312 vanished before elimination [2021-06-12 19:58:36,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:36,008 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-12 19:58:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:36,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038809006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:36,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:36,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:58:36,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407186075] [2021-06-12 19:58:36,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:36,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:36,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:36,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:36,033 INFO L87 Difference]: Start difference. First operand 1367 states and 3979 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:37,187 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-06-12 19:58:37,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:37,313 INFO L93 Difference]: Finished difference Result 1527 states and 4324 transitions. [2021-06-12 19:58:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:58:37,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:37,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:37,315 INFO L225 Difference]: With dead ends: 1527 [2021-06-12 19:58:37,315 INFO L226 Difference]: Without dead ends: 1524 [2021-06-12 19:58:37,316 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1703.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:58:37,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-06-12 19:58:37,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1398. [2021-06-12 19:58:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.9098067287043663) internal successors, (4065), 1397 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4065 transitions. [2021-06-12 19:58:37,329 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4065 transitions. Word has length 18 [2021-06-12 19:58:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:37,329 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4065 transitions. [2021-06-12 19:58:37,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:37,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4065 transitions. [2021-06-12 19:58:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:37,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:37,330 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:37,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3116,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:37,530 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:37,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:37,530 INFO L82 PathProgramCache]: Analyzing trace with hash -124738816, now seen corresponding path program 378 times [2021-06-12 19:58:37,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:37,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97328662] [2021-06-12 19:58:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:37,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:37,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97328662] [2021-06-12 19:58:37,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97328662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:37,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043892917] [2021-06-12 19:58:37,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:37,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:58:37,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:37,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:37,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-06-12 19:58:38,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2021-06-12 19:58:38,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:58:38,391 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:38,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:58:38,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:38,471 INFO L628 ElimStorePlain]: treesize reduction 101, result has 40.6 percent of original size [2021-06-12 19:58:38,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:38,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:58:38,475 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:38,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:38,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:38,502 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:305, output treesize:48 [2021-06-12 19:58:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:38,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043892917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:38,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:38,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 19:58:38,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692202826] [2021-06-12 19:58:38,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:38,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:38,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:38,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:38,577 INFO L87 Difference]: Start difference. First operand 1398 states and 4065 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:39,697 INFO L93 Difference]: Finished difference Result 1627 states and 4586 transitions. [2021-06-12 19:58:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:58:39,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:39,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:39,699 INFO L225 Difference]: With dead ends: 1627 [2021-06-12 19:58:39,699 INFO L226 Difference]: Without dead ends: 1619 [2021-06-12 19:58:39,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1466.1ms TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:58:39,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-06-12 19:58:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1442. [2021-06-12 19:58:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.9222761970853575) internal successors, (4211), 1441 states have internal predecessors, (4211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4211 transitions. [2021-06-12 19:58:39,713 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4211 transitions. Word has length 18 [2021-06-12 19:58:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:39,713 INFO L482 AbstractCegarLoop]: Abstraction has 1442 states and 4211 transitions. [2021-06-12 19:58:39,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4211 transitions. [2021-06-12 19:58:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:39,714 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:39,714 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:39,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3134,383 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:39,915 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:39,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:39,915 INFO L82 PathProgramCache]: Analyzing trace with hash 42024968, now seen corresponding path program 379 times [2021-06-12 19:58:39,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:39,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749267706] [2021-06-12 19:58:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:40,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749267706] [2021-06-12 19:58:40,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749267706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071965898] [2021-06-12 19:58:40,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:40,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:40,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:41,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:41,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:41,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:41,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:41,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,245 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-12 19:58:41,246 INFO L518 ElimStorePlain]: Eliminatee v_prenex_319 vanished before elimination [2021-06-12 19:58:41,246 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:58:41,246 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:41,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:41,246 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:41,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:41,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071965898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:41,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:41,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:58:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817153750] [2021-06-12 19:58:41,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:41,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:41,276 INFO L87 Difference]: Start difference. First operand 1442 states and 4211 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:42,287 INFO L93 Difference]: Finished difference Result 1508 states and 4349 transitions. [2021-06-12 19:58:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:58:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:42,289 INFO L225 Difference]: With dead ends: 1508 [2021-06-12 19:58:42,289 INFO L226 Difference]: Without dead ends: 1498 [2021-06-12 19:58:42,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1660.0ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:42,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-06-12 19:58:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1443. [2021-06-12 19:58:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 2.921636615811373) internal successors, (4213), 1442 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 4213 transitions. [2021-06-12 19:58:42,302 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 4213 transitions. Word has length 18 [2021-06-12 19:58:42,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:42,302 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 4213 transitions. [2021-06-12 19:58:42,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 4213 transitions. [2021-06-12 19:58:42,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:42,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:42,303 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:42,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3156,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:42,504 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:42,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1544022984, now seen corresponding path program 380 times [2021-06-12 19:58:42,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:42,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748964069] [2021-06-12 19:58:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:42,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:42,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748964069] [2021-06-12 19:58:42,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748964069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:42,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928318912] [2021-06-12 19:58:42,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:42,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:42,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:43,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:43,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:43,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:43,384 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,395 INFO L628 ElimStorePlain]: treesize reduction 112, result has 8.9 percent of original size [2021-06-12 19:58:43,396 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:43,396 INFO L518 ElimStorePlain]: Eliminatee v_prenex_323 vanished before elimination [2021-06-12 19:58:43,396 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-06-12 19:58:43,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:43,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:43,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928318912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:43,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:43,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 19:58:43,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539243752] [2021-06-12 19:58:43,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:58:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:43,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:58:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:58:43,405 INFO L87 Difference]: Start difference. First operand 1443 states and 4213 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:43,983 INFO L93 Difference]: Finished difference Result 1494 states and 4320 transitions. [2021-06-12 19:58:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:58:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:43,985 INFO L225 Difference]: With dead ends: 1494 [2021-06-12 19:58:43,985 INFO L226 Difference]: Without dead ends: 1485 [2021-06-12 19:58:43,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 931.4ms TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:58:43,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-06-12 19:58:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 1451. [2021-06-12 19:58:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 2.9172413793103447) internal successors, (4230), 1450 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:43,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 4230 transitions. [2021-06-12 19:58:43,998 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 4230 transitions. Word has length 18 [2021-06-12 19:58:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:43,998 INFO L482 AbstractCegarLoop]: Abstraction has 1451 states and 4230 transitions. [2021-06-12 19:58:43,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:43,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 4230 transitions. [2021-06-12 19:58:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:43,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:43,999 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:44,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3175,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:44,199 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1783665322, now seen corresponding path program 381 times [2021-06-12 19:58:44,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:44,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252200021] [2021-06-12 19:58:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:44,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:44,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252200021] [2021-06-12 19:58:44,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252200021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:44,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181245523] [2021-06-12 19:58:44,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:44,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:58:44,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:44,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:44,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:45,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:58:45,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:45,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,427 INFO L628 ElimStorePlain]: treesize reduction 91, result has 47.4 percent of original size [2021-06-12 19:58:45,427 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:45,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:45,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:58:45,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:45,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:58:45,449 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:45,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:45,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:45,460 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:257, output treesize:22 [2021-06-12 19:58:45,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:45,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181245523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:45,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:45,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-12 19:58:45,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884441193] [2021-06-12 19:58:45,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:58:45,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:58:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:45,481 INFO L87 Difference]: Start difference. First operand 1451 states and 4230 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,379 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2021-06-12 19:58:46,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:46,729 INFO L93 Difference]: Finished difference Result 1633 states and 4654 transitions. [2021-06-12 19:58:46,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:58:46,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:46,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:46,731 INFO L225 Difference]: With dead ends: 1633 [2021-06-12 19:58:46,731 INFO L226 Difference]: Without dead ends: 1623 [2021-06-12 19:58:46,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1683.7ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-12 19:58:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1478. [2021-06-12 19:58:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1477 states have (on average 2.920108327691266) internal successors, (4313), 1477 states have internal predecessors, (4313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 4313 transitions. [2021-06-12 19:58:46,745 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 4313 transitions. Word has length 18 [2021-06-12 19:58:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:46,745 INFO L482 AbstractCegarLoop]: Abstraction has 1478 states and 4313 transitions. [2021-06-12 19:58:46,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 4313 transitions. [2021-06-12 19:58:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:46,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:46,747 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:46,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3193 [2021-06-12 19:58:46,947 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1791395720, now seen corresponding path program 382 times [2021-06-12 19:58:46,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:46,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424986212] [2021-06-12 19:58:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:47,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424986212] [2021-06-12 19:58:47,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424986212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588740468] [2021-06-12 19:58:47,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:47,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:58:47,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:47,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:47,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:47,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:47,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2021-06-12 19:58:47,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:47,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:47,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:47,773 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,785 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-12 19:58:47,785 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:47,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:47,786 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:194, output treesize:11 [2021-06-12 19:58:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:47,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588740468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:47,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:47,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:58:47,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465144474] [2021-06-12 19:58:47,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:47,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:47,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:47,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:47,812 INFO L87 Difference]: Start difference. First operand 1478 states and 4313 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:48,523 INFO L93 Difference]: Finished difference Result 1690 states and 4811 transitions. [2021-06-12 19:58:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:58:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:48,526 INFO L225 Difference]: With dead ends: 1690 [2021-06-12 19:58:48,526 INFO L226 Difference]: Without dead ends: 1687 [2021-06-12 19:58:48,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 957.9ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:58:48,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-06-12 19:58:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1566. [2021-06-12 19:58:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 2.94888178913738) internal successors, (4615), 1565 states have internal predecessors, (4615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 4615 transitions. [2021-06-12 19:58:48,543 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 4615 transitions. Word has length 18 [2021-06-12 19:58:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:48,543 INFO L482 AbstractCegarLoop]: Abstraction has 1566 states and 4615 transitions. [2021-06-12 19:58:48,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 4615 transitions. [2021-06-12 19:58:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:48,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:48,544 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:48,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-06-12 19:58:48,745 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:48,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash -2089409042, now seen corresponding path program 383 times [2021-06-12 19:58:48,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:48,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106601085] [2021-06-12 19:58:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:48,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106601085] [2021-06-12 19:58:49,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106601085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735364332] [2021-06-12 19:58:49,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:49,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:58:49,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:49,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:49,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:49,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:49,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:49,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:49,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,914 INFO L628 ElimStorePlain]: treesize reduction 147, result has 7.0 percent of original size [2021-06-12 19:58:49,914 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:58:49,914 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:49,914 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-06-12 19:58:49,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:49,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-12 19:58:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:49,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735364332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:49,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:49,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:58:49,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509484255] [2021-06-12 19:58:49,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:49,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:49,943 INFO L87 Difference]: Start difference. First operand 1566 states and 4615 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:51,419 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 19:58:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:51,570 INFO L93 Difference]: Finished difference Result 1665 states and 4804 transitions. [2021-06-12 19:58:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:58:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:51,573 INFO L225 Difference]: With dead ends: 1665 [2021-06-12 19:58:51,573 INFO L226 Difference]: Without dead ends: 1662 [2021-06-12 19:58:51,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2123.2ms TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:58:51,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-06-12 19:58:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1578. [2021-06-12 19:58:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 2.946734305643627) internal successors, (4647), 1577 states have internal predecessors, (4647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 4647 transitions. [2021-06-12 19:58:51,593 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 4647 transitions. Word has length 18 [2021-06-12 19:58:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:51,594 INFO L482 AbstractCegarLoop]: Abstraction has 1578 states and 4647 transitions. [2021-06-12 19:58:51,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:51,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 4647 transitions. [2021-06-12 19:58:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:51,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:51,595 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:51,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:51,796 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:51,796 INFO L82 PathProgramCache]: Analyzing trace with hash 723883656, now seen corresponding path program 384 times [2021-06-12 19:58:51,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:51,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914102322] [2021-06-12 19:58:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:52,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914102322] [2021-06-12 19:58:52,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914102322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639974331] [2021-06-12 19:58:52,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:52,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:58:52,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:52,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:52,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 30 [2021-06-12 19:58:52,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:52,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:52,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:52,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 46 [2021-06-12 19:58:52,820 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:52,886 INFO L628 ElimStorePlain]: treesize reduction 101, result has 42.0 percent of original size [2021-06-12 19:58:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:52,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:58:52,890 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:58:52,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:58:52,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:58:52,918 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:329, output treesize:52 [2021-06-12 19:58:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:52,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639974331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:52,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:52,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 19:58:52,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890009732] [2021-06-12 19:58:52,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:52,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:52,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:52,982 INFO L87 Difference]: Start difference. First operand 1578 states and 4647 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:54,335 INFO L93 Difference]: Finished difference Result 1745 states and 5001 transitions. [2021-06-12 19:58:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:58:54,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:54,337 INFO L225 Difference]: With dead ends: 1745 [2021-06-12 19:58:54,337 INFO L226 Difference]: Without dead ends: 1736 [2021-06-12 19:58:54,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1679.0ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:58:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-12 19:58:54,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1590. [2021-06-12 19:58:54,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 2.951541850220264) internal successors, (4690), 1589 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 4690 transitions. [2021-06-12 19:58:54,353 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 4690 transitions. Word has length 18 [2021-06-12 19:58:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:54,353 INFO L482 AbstractCegarLoop]: Abstraction has 1590 states and 4690 transitions. [2021-06-12 19:58:54,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:54,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 4690 transitions. [2021-06-12 19:58:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:54,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:54,355 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:54,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:54,555 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash -302051606, now seen corresponding path program 385 times [2021-06-12 19:58:54,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:54,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801430187] [2021-06-12 19:58:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:54,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801430187] [2021-06-12 19:58:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801430187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:54,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680999015] [2021-06-12 19:58:54,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:54,853 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:54,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:55,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:55,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:55,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:58:55,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,576 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-12 19:58:55,576 INFO L518 ElimStorePlain]: Eliminatee v_prenex_339 vanished before elimination [2021-06-12 19:58:55,576 INFO L518 ElimStorePlain]: Eliminatee array_0 vanished before elimination [2021-06-12 19:58:55,577 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:55,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:55,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:58:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:55,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680999015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:55,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:55,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 19:58:55,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518238685] [2021-06-12 19:58:55,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:58:55,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:55,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:58:55,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:58:55,586 INFO L87 Difference]: Start difference. First operand 1590 states and 4690 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:56,598 INFO L93 Difference]: Finished difference Result 1737 states and 4961 transitions. [2021-06-12 19:58:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:58:56,599 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:56,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:56,601 INFO L225 Difference]: With dead ends: 1737 [2021-06-12 19:58:56,601 INFO L226 Difference]: Without dead ends: 1719 [2021-06-12 19:58:56,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1370.8ms TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:58:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2021-06-12 19:58:56,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1562. [2021-06-12 19:58:56,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 2.9506726457399104) internal successors, (4606), 1561 states have internal predecessors, (4606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 4606 transitions. [2021-06-12 19:58:56,617 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 4606 transitions. Word has length 18 [2021-06-12 19:58:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:56,617 INFO L482 AbstractCegarLoop]: Abstraction has 1562 states and 4606 transitions. [2021-06-12 19:58:56,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 4606 transitions. [2021-06-12 19:58:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:56,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:56,618 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:56,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3278 [2021-06-12 19:58:56,819 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash -2114266168, now seen corresponding path program 386 times [2021-06-12 19:58:56,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:56,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073538820] [2021-06-12 19:58:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:57,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073538820] [2021-06-12 19:58:57,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073538820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959471149] [2021-06-12 19:58:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:57,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:58:57,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:57,120 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:58:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:57,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:57,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 38 [2021-06-12 19:58:57,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,891 INFO L628 ElimStorePlain]: treesize reduction 143, result has 7.1 percent of original size [2021-06-12 19:58:57,891 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:57,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_343 vanished before elimination [2021-06-12 19:58:57,891 INFO L518 ElimStorePlain]: Eliminatee v_prenex_344 vanished before elimination [2021-06-12 19:58:57,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:57,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:194, output treesize:11 [2021-06-12 19:58:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:57,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959471149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:57,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:57,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 19:58:57,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814501962] [2021-06-12 19:58:57,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:58:57,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:58:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:58:57,919 INFO L87 Difference]: Start difference. First operand 1562 states and 4606 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:58:58,600 INFO L93 Difference]: Finished difference Result 1728 states and 4945 transitions. [2021-06-12 19:58:58,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:58:58,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:58:58,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:58:58,602 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 19:58:58,602 INFO L226 Difference]: Without dead ends: 1713 [2021-06-12 19:58:58,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1197.2ms TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:58:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-06-12 19:58:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1598. [2021-06-12 19:58:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.949906073888541) internal successors, (4711), 1597 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4711 transitions. [2021-06-12 19:58:58,619 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4711 transitions. Word has length 18 [2021-06-12 19:58:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:58:58,619 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4711 transitions. [2021-06-12 19:58:58,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:58:58,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4711 transitions. [2021-06-12 19:58:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:58:58,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:58:58,620 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:58:58,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-06-12 19:58:58,821 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:58:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:58:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1895630038, now seen corresponding path program 387 times [2021-06-12 19:58:58,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:58:58,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273106165] [2021-06-12 19:58:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:58:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:58:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:58,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:58:58,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273106165] [2021-06-12 19:58:58,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273106165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:58,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743570873] [2021-06-12 19:58:58,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:58:59,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:58:59,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:58:59,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:58:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:58:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-06-12 19:58:59,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:58:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:58:59,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:58:59,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,762 INFO L628 ElimStorePlain]: treesize reduction 104, result has 9.6 percent of original size [2021-06-12 19:58:59,762 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:58:59,762 INFO L518 ElimStorePlain]: Eliminatee v_prenex_346 vanished before elimination [2021-06-12 19:58:59,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_347 vanished before elimination [2021-06-12 19:58:59,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:58:59,763 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:182, output treesize:11 [2021-06-12 19:58:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:58:59,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743570873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:58:59,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:58:59,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:58:59,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110247684] [2021-06-12 19:58:59,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:58:59,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:58:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:58:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:58:59,788 INFO L87 Difference]: Start difference. First operand 1598 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:00,712 INFO L93 Difference]: Finished difference Result 1701 states and 4889 transitions. [2021-06-12 19:59:00,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:59:00,713 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:00,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:00,714 INFO L225 Difference]: With dead ends: 1701 [2021-06-12 19:59:00,715 INFO L226 Difference]: Without dead ends: 1696 [2021-06-12 19:59:00,715 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1356.2ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:59:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-06-12 19:59:00,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1539. [2021-06-12 19:59:00,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.9408322496749024) internal successors, (4523), 1538 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:00,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4523 transitions. [2021-06-12 19:59:00,731 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4523 transitions. Word has length 18 [2021-06-12 19:59:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:00,731 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4523 transitions. [2021-06-12 19:59:00,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4523 transitions. [2021-06-12 19:59:00,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:00,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:00,732 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:00,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:00,932 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:00,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:00,933 INFO L82 PathProgramCache]: Analyzing trace with hash 917662660, now seen corresponding path program 388 times [2021-06-12 19:59:00,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:00,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082202728] [2021-06-12 19:59:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:59:01,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082202728] [2021-06-12 19:59:01,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082202728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353753834] [2021-06-12 19:59:01,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:01,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:01,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:01,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:01,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:01,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-12 19:59:01,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:01,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:01,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:01,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,787 INFO L628 ElimStorePlain]: treesize reduction 62, result has 15.1 percent of original size [2021-06-12 19:59:01,787 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:01,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:01,788 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-12 19:59:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353753834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:01,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:01,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-12 19:59:01,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47099055] [2021-06-12 19:59:01,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:01,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:01,815 INFO L87 Difference]: Start difference. First operand 1539 states and 4523 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:03,068 INFO L93 Difference]: Finished difference Result 1648 states and 4754 transitions. [2021-06-12 19:59:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:59:03,069 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:03,071 INFO L225 Difference]: With dead ends: 1648 [2021-06-12 19:59:03,071 INFO L226 Difference]: Without dead ends: 1640 [2021-06-12 19:59:03,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1553.1ms TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:59:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-06-12 19:59:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1538. [2021-06-12 19:59:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.9362394274560835) internal successors, (4513), 1537 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4513 transitions. [2021-06-12 19:59:03,086 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4513 transitions. Word has length 18 [2021-06-12 19:59:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:03,086 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4513 transitions. [2021-06-12 19:59:03,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4513 transitions. [2021-06-12 19:59:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:03,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:03,088 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:03,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:03,293 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:03,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:03,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1990748040, now seen corresponding path program 389 times [2021-06-12 19:59:03,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:03,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775005277] [2021-06-12 19:59:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:03,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:03,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775005277] [2021-06-12 19:59:03,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775005277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:03,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467311205] [2021-06-12 19:59:03,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:03,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:03,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:03,604 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:03,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:04,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-12 19:59:04,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:04,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:04,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:04,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,253 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-12 19:59:04,254 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:04,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:04,254 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-12 19:59:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:04,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467311205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:04,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:04,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-06-12 19:59:04,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229967719] [2021-06-12 19:59:04,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:59:04,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:59:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:04,283 INFO L87 Difference]: Start difference. First operand 1538 states and 4513 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:05,982 INFO L93 Difference]: Finished difference Result 1695 states and 4818 transitions. [2021-06-12 19:59:05,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:59:05,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:05,985 INFO L225 Difference]: With dead ends: 1695 [2021-06-12 19:59:05,985 INFO L226 Difference]: Without dead ends: 1685 [2021-06-12 19:59:05,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2027.8ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:59:05,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2021-06-12 19:59:05,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1536. [2021-06-12 19:59:05,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.9381107491856677) internal successors, (4510), 1535 states have internal predecessors, (4510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:06,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 4510 transitions. [2021-06-12 19:59:06,000 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 4510 transitions. Word has length 18 [2021-06-12 19:59:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:06,000 INFO L482 AbstractCegarLoop]: Abstraction has 1536 states and 4510 transitions. [2021-06-12 19:59:06,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 4510 transitions. [2021-06-12 19:59:06,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:06,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:06,002 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:06,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:06,202 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:06,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:06,202 INFO L82 PathProgramCache]: Analyzing trace with hash 579517824, now seen corresponding path program 390 times [2021-06-12 19:59:06,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:06,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750234164] [2021-06-12 19:59:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:06,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:06,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750234164] [2021-06-12 19:59:06,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750234164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:06,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138334571] [2021-06-12 19:59:06,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:06,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:06,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:06,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:06,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:07,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:07,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:07,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:07,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:07,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:07,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:59:07,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,161 INFO L628 ElimStorePlain]: treesize reduction 155, result has 6.6 percent of original size [2021-06-12 19:59:07,161 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:07,162 INFO L518 ElimStorePlain]: Eliminatee v_prenex_353 vanished before elimination [2021-06-12 19:59:07,162 INFO L518 ElimStorePlain]: Eliminatee v_prenex_354 vanished before elimination [2021-06-12 19:59:07,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:07,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:59:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:07,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138334571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:07,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 19:59:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835680612] [2021-06-12 19:59:07,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:59:07,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:59:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:07,171 INFO L87 Difference]: Start difference. First operand 1536 states and 4510 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:07,682 INFO L93 Difference]: Finished difference Result 1589 states and 4619 transitions. [2021-06-12 19:59:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:59:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:07,684 INFO L225 Difference]: With dead ends: 1589 [2021-06-12 19:59:07,684 INFO L226 Difference]: Without dead ends: 1582 [2021-06-12 19:59:07,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 901.4ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-12 19:59:07,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1540. [2021-06-12 19:59:07,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.935672514619883) internal successors, (4518), 1539 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:07,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 4518 transitions. [2021-06-12 19:59:07,700 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 4518 transitions. Word has length 18 [2021-06-12 19:59:07,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:07,700 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 4518 transitions. [2021-06-12 19:59:07,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:07,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 4518 transitions. [2021-06-12 19:59:07,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:07,701 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:07,701 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:07,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:07,902 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:07,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2081515840, now seen corresponding path program 391 times [2021-06-12 19:59:07,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:07,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485703917] [2021-06-12 19:59:07,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:08,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:08,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485703917] [2021-06-12 19:59:08,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485703917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309597219] [2021-06-12 19:59:08,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:08,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:08,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:08,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:59:08,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:08,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:59:08,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,784 INFO L628 ElimStorePlain]: treesize reduction 110, result has 9.1 percent of original size [2021-06-12 19:59:08,784 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:08,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_357 vanished before elimination [2021-06-12 19:59:08,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-12 19:59:08,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:08,784 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:59:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:08,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309597219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:08,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:08,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-12 19:59:08,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366702640] [2021-06-12 19:59:08,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:59:08,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:08,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:59:08,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:08,794 INFO L87 Difference]: Start difference. First operand 1540 states and 4518 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:09,366 INFO L93 Difference]: Finished difference Result 1632 states and 4677 transitions. [2021-06-12 19:59:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:59:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:09,368 INFO L225 Difference]: With dead ends: 1632 [2021-06-12 19:59:09,368 INFO L226 Difference]: Without dead ends: 1623 [2021-06-12 19:59:09,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 991.1ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:09,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-06-12 19:59:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1544. [2021-06-12 19:59:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.929358392741413) internal successors, (4520), 1543 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4520 transitions. [2021-06-12 19:59:09,384 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4520 transitions. Word has length 18 [2021-06-12 19:59:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:09,384 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4520 transitions. [2021-06-12 19:59:09,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4520 transitions. [2021-06-12 19:59:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:09,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:09,385 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:09,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3419 [2021-06-12 19:59:09,586 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:09,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:09,586 INFO L82 PathProgramCache]: Analyzing trace with hash 659752486, now seen corresponding path program 392 times [2021-06-12 19:59:09,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:09,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210542284] [2021-06-12 19:59:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:09,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:09,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210542284] [2021-06-12 19:59:09,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210542284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:09,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823052682] [2021-06-12 19:59:09,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:09,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:09,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:09,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:09,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:10,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:59:10,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:10,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:10,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2021-06-12 19:59:10,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,636 INFO L628 ElimStorePlain]: treesize reduction 106, result has 9.4 percent of original size [2021-06-12 19:59:10,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:10,636 INFO L518 ElimStorePlain]: Eliminatee v_prenex_363 vanished before elimination [2021-06-12 19:59:10,636 INFO L518 ElimStorePlain]: Eliminatee v_prenex_364 vanished before elimination [2021-06-12 19:59:10,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:10,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:206, output treesize:11 [2021-06-12 19:59:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:10,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823052682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:10,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:10,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-12 19:59:10,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131527861] [2021-06-12 19:59:10,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:59:10,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:10,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:59:10,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:10,662 INFO L87 Difference]: Start difference. First operand 1544 states and 4520 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:11,248 INFO L93 Difference]: Finished difference Result 1739 states and 4962 transitions. [2021-06-12 19:59:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:59:11,249 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:11,251 INFO L225 Difference]: With dead ends: 1739 [2021-06-12 19:59:11,251 INFO L226 Difference]: Without dead ends: 1730 [2021-06-12 19:59:11,251 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1047.6ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:59:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-06-12 19:59:11,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1597. [2021-06-12 19:59:11,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 2.93796992481203) internal successors, (4689), 1596 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 4689 transitions. [2021-06-12 19:59:11,268 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 4689 transitions. Word has length 18 [2021-06-12 19:59:11,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:11,268 INFO L482 AbstractCegarLoop]: Abstraction has 1597 states and 4689 transitions. [2021-06-12 19:59:11,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 4689 transitions. [2021-06-12 19:59:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:11,270 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:11,270 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:11,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3439 [2021-06-12 19:59:11,471 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:11,471 INFO L82 PathProgramCache]: Analyzing trace with hash -307490624, now seen corresponding path program 393 times [2021-06-12 19:59:11,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:11,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095338077] [2021-06-12 19:59:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:11,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095338077] [2021-06-12 19:59:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095338077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132956909] [2021-06-12 19:59:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:11,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:59:11,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:11,758 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-06-12 19:59:11,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:59:12,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2021-06-12 19:59:12,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2021-06-12 19:59:12,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 40 [2021-06-12 19:59:12,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:12,505 INFO L628 ElimStorePlain]: treesize reduction 105, result has 41.0 percent of original size [2021-06-12 19:59:12,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:12,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-06-12 19:59:12,509 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-12 19:59:12,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:12,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:12,535 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:345, output treesize:56 [2021-06-12 19:59:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:12,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132956909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:12,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:12,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 19:59:12,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072216591] [2021-06-12 19:59:12,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:59:12,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:59:12,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:12,596 INFO L87 Difference]: Start difference. First operand 1597 states and 4689 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:13,187 INFO L93 Difference]: Finished difference Result 1778 states and 5087 transitions. [2021-06-12 19:59:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:59:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:13,189 INFO L225 Difference]: With dead ends: 1778 [2021-06-12 19:59:13,189 INFO L226 Difference]: Without dead ends: 1769 [2021-06-12 19:59:13,189 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1048.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:59:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2021-06-12 19:59:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1652. [2021-06-12 19:59:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 2.9448818897637796) internal successors, (4862), 1651 states have internal predecessors, (4862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:13,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 4862 transitions. [2021-06-12 19:59:13,205 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 4862 transitions. Word has length 18 [2021-06-12 19:59:13,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:13,205 INFO L482 AbstractCegarLoop]: Abstraction has 1652 states and 4862 transitions. [2021-06-12 19:59:13,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:13,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 4862 transitions. [2021-06-12 19:59:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:13,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:13,207 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:13,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3459,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:13,407 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:13,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:13,408 INFO L82 PathProgramCache]: Analyzing trace with hash 354044646, now seen corresponding path program 394 times [2021-06-12 19:59:13,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:13,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578165857] [2021-06-12 19:59:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:13,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:13,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:13,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578165857] [2021-06-12 19:59:13,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578165857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:13,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029272069] [2021-06-12 19:59:13,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:14,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:14,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:14,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:14,495 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-12 19:59:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2021-06-12 19:59:14,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2021-06-12 19:59:14,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,806 INFO L628 ElimStorePlain]: treesize reduction 87, result has 46.3 percent of original size [2021-06-12 19:59:14,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:14,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 19:59:14,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:14,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-06-12 19:59:14,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:14,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:59:14,839 INFO L518 ElimStorePlain]: Eliminatee v_prenex_369 vanished before elimination [2021-06-12 19:59:14,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:14,840 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:225, output treesize:22 [2021-06-12 19:59:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029272069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:14,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:14,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:59:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351013820] [2021-06-12 19:59:14,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:59:14,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:59:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:14,879 INFO L87 Difference]: Start difference. First operand 1652 states and 4862 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:15,839 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-06-12 19:59:16,086 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 74 [2021-06-12 19:59:16,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:16,393 INFO L93 Difference]: Finished difference Result 1766 states and 5087 transitions. [2021-06-12 19:59:16,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:59:16,393 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:16,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:16,400 INFO L225 Difference]: With dead ends: 1766 [2021-06-12 19:59:16,400 INFO L226 Difference]: Without dead ends: 1760 [2021-06-12 19:59:16,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 2160.9ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:59:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2021-06-12 19:59:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1664. [2021-06-12 19:59:16,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 2.9464822609741432) internal successors, (4900), 1663 states have internal predecessors, (4900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 4900 transitions. [2021-06-12 19:59:16,417 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 4900 transitions. Word has length 18 [2021-06-12 19:59:16,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:16,417 INFO L482 AbstractCegarLoop]: Abstraction has 1664 states and 4900 transitions. [2021-06-12 19:59:16,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 4900 transitions. [2021-06-12 19:59:16,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:16,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:16,419 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:16,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3472 [2021-06-12 19:59:16,619 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:16,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:16,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1127629952, now seen corresponding path program 395 times [2021-06-12 19:59:16,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:16,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592777056] [2021-06-12 19:59:16,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:17,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:17,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592777056] [2021-06-12 19:59:17,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592777056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002305222] [2021-06-12 19:59:17,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:17,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:17,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:17,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:17,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:59:17,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:17,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-06-12 19:59:17,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:17,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:17,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,838 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-12 19:59:17,838 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:17,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:17,838 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:11 [2021-06-12 19:59:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002305222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:17,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:17,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:59:17,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109883317] [2021-06-12 19:59:17,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:59:17,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:17,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:59:17,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:17,872 INFO L87 Difference]: Start difference. First operand 1664 states and 4900 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,095 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-12 19:59:19,249 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-12 19:59:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:19,537 INFO L93 Difference]: Finished difference Result 1734 states and 5045 transitions. [2021-06-12 19:59:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:59:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:19,539 INFO L225 Difference]: With dead ends: 1734 [2021-06-12 19:59:19,539 INFO L226 Difference]: Without dead ends: 1726 [2021-06-12 19:59:19,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2256.1ms TimeCoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:59:19,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-06-12 19:59:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1667. [2021-06-12 19:59:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 2.946578631452581) internal successors, (4909), 1666 states have internal predecessors, (4909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 4909 transitions. [2021-06-12 19:59:19,563 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 4909 transitions. Word has length 18 [2021-06-12 19:59:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:19,564 INFO L482 AbstractCegarLoop]: Abstraction has 1667 states and 4909 transitions. [2021-06-12 19:59:19,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 4909 transitions. [2021-06-12 19:59:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:19,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:19,565 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:19,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-06-12 19:59:19,766 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:19,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:19,766 INFO L82 PathProgramCache]: Analyzing trace with hash -54544572, now seen corresponding path program 396 times [2021-06-12 19:59:19,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:19,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248689280] [2021-06-12 19:59:19,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:20,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:20,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248689280] [2021-06-12 19:59:20,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248689280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:20,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821244339] [2021-06-12 19:59:20,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:20,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:59:20,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:20,411 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:20,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-12 19:59:20,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:20,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-06-12 19:59:20,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:20,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:20,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:20,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:20,994 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,010 INFO L628 ElimStorePlain]: treesize reduction 83, result has 15.3 percent of original size [2021-06-12 19:59:21,010 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:21,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:21,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:217, output treesize:11 [2021-06-12 19:59:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:21,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821244339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:21,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:21,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-12 19:59:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858201171] [2021-06-12 19:59:21,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:59:21,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:59:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:21,057 INFO L87 Difference]: Start difference. First operand 1667 states and 4909 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,156 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 19:59:22,436 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 19:59:22,633 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-12 19:59:22,965 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-06-12 19:59:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:22,979 INFO L93 Difference]: Finished difference Result 1730 states and 5034 transitions. [2021-06-12 19:59:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:59:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:22,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:22,981 INFO L225 Difference]: With dead ends: 1730 [2021-06-12 19:59:22,981 INFO L226 Difference]: Without dead ends: 1722 [2021-06-12 19:59:22,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2485.2ms TimeCoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:59:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-06-12 19:59:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1665. [2021-06-12 19:59:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 2.9459134615384617) internal successors, (4902), 1664 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 4902 transitions. [2021-06-12 19:59:22,997 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 4902 transitions. Word has length 18 [2021-06-12 19:59:22,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:22,997 INFO L482 AbstractCegarLoop]: Abstraction has 1665 states and 4902 transitions. [2021-06-12 19:59:22,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 4902 transitions. [2021-06-12 19:59:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 19:59:22,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:22,999 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:23,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:23,199 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:23,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1148636160, now seen corresponding path program 397 times [2021-06-12 19:59:23,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:23,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317602335] [2021-06-12 19:59:23,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:23,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317602335] [2021-06-12 19:59:23,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317602335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11364301] [2021-06-12 19:59:23,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:23,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:23,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 19:59:23,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:23,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:23,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 36 [2021-06-12 19:59:23,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 19:59:23,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-06-12 19:59:23,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,906 INFO L628 ElimStorePlain]: treesize reduction 72, result has 13.3 percent of original size [2021-06-12 19:59:23,906 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:23,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:23,907 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:11 [2021-06-12 19:59:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:23,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11364301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:23,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:23,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-12 19:59:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102389589] [2021-06-12 19:59:23,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:23,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:23,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:23,916 INFO L87 Difference]: Start difference. First operand 1665 states and 4902 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:24,729 INFO L93 Difference]: Finished difference Result 1814 states and 5191 transitions. [2021-06-12 19:59:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:59:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 19:59:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:24,731 INFO L225 Difference]: With dead ends: 1814 [2021-06-12 19:59:24,731 INFO L226 Difference]: Without dead ends: 1811 [2021-06-12 19:59:24,732 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 941.2ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:59:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1811 states. [2021-06-12 19:59:24,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1811 to 1630. [2021-06-12 19:59:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 2.9441375076734193) internal successors, (4796), 1629 states have internal predecessors, (4796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 4796 transitions. [2021-06-12 19:59:24,749 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 4796 transitions. Word has length 18 [2021-06-12 19:59:24,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:24,749 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 4796 transitions. [2021-06-12 19:59:24,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 4796 transitions. [2021-06-12 19:59:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:24,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:24,750 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:24,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:24,957 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:24,957 INFO L82 PathProgramCache]: Analyzing trace with hash -670707060, now seen corresponding path program 398 times [2021-06-12 19:59:24,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:24,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724987339] [2021-06-12 19:59:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:25,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724987339] [2021-06-12 19:59:25,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724987339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880036016] [2021-06-12 19:59:25,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:25,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:25,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:25,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:25,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:25,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:25,221 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:25,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:25,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:25,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:25,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:25,253 INFO L628 ElimStorePlain]: treesize reduction 34, result has 37.0 percent of original size [2021-06-12 19:59:25,253 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:25,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:25,254 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 19:59:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:25,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880036016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:25,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:25,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:59:25,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622314441] [2021-06-12 19:59:25,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:25,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:25,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:25,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:25,282 INFO L87 Difference]: Start difference. First operand 1630 states and 4796 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:25,694 INFO L93 Difference]: Finished difference Result 2344 states and 6637 transitions. [2021-06-12 19:59:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:59:25,694 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:25,696 INFO L225 Difference]: With dead ends: 2344 [2021-06-12 19:59:25,696 INFO L226 Difference]: Without dead ends: 2331 [2021-06-12 19:59:25,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:59:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-12 19:59:25,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1627. [2021-06-12 19:59:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.945879458794588) internal successors, (4790), 1626 states have internal predecessors, (4790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 4790 transitions. [2021-06-12 19:59:25,714 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 4790 transitions. Word has length 19 [2021-06-12 19:59:25,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:25,714 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 4790 transitions. [2021-06-12 19:59:25,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:25,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 4790 transitions. [2021-06-12 19:59:25,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:25,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:25,716 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:25,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:25,916 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1117071366, now seen corresponding path program 399 times [2021-06-12 19:59:25,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:25,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328565651] [2021-06-12 19:59:25,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328565651] [2021-06-12 19:59:26,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328565651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626412943] [2021-06-12 19:59:26,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:26,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:26,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:26,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:26,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:26,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:26,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:26,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,186 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 19:59:26,186 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:26,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,186 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 19:59:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626412943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:26,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:59:26,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892167336] [2021-06-12 19:59:26,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:59:26,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:59:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:59:26,207 INFO L87 Difference]: Start difference. First operand 1627 states and 4790 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:26,428 INFO L93 Difference]: Finished difference Result 2346 states and 6648 transitions. [2021-06-12 19:59:26,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:26,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:26,430 INFO L225 Difference]: With dead ends: 2346 [2021-06-12 19:59:26,430 INFO L226 Difference]: Without dead ends: 2346 [2021-06-12 19:59:26,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:59:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-12 19:59:26,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1628. [2021-06-12 19:59:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 2.945912722802704) internal successors, (4793), 1627 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:26,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 4793 transitions. [2021-06-12 19:59:26,449 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 4793 transitions. Word has length 19 [2021-06-12 19:59:26,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:26,449 INFO L482 AbstractCegarLoop]: Abstraction has 1628 states and 4793 transitions. [2021-06-12 19:59:26,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 4793 transitions. [2021-06-12 19:59:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:26,451 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:26,451 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:26,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3591,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:26,651 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1608725978, now seen corresponding path program 400 times [2021-06-12 19:59:26,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:26,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510260308] [2021-06-12 19:59:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:26,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510260308] [2021-06-12 19:59:26,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510260308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878169800] [2021-06-12 19:59:26,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:26,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:26,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:26,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:26,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:26,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:26,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:26,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:26,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:26,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:26,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:26,980 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:26,980 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:26,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:26,981 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878169800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:27,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:27,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396320610] [2021-06-12 19:59:27,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:27,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:27,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:27,036 INFO L87 Difference]: Start difference. First operand 1628 states and 4793 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:27,436 INFO L93 Difference]: Finished difference Result 2429 states and 6790 transitions. [2021-06-12 19:59:27,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:59:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:27,439 INFO L225 Difference]: With dead ends: 2429 [2021-06-12 19:59:27,439 INFO L226 Difference]: Without dead ends: 2429 [2021-06-12 19:59:27,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:59:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-12 19:59:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1643. [2021-06-12 19:59:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.949451887941535) internal successors, (4843), 1642 states have internal predecessors, (4843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4843 transitions. [2021-06-12 19:59:27,458 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4843 transitions. Word has length 19 [2021-06-12 19:59:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:27,458 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4843 transitions. [2021-06-12 19:59:27,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4843 transitions. [2021-06-12 19:59:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:27,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:27,459 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:27,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-06-12 19:59:27,660 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1884625090, now seen corresponding path program 401 times [2021-06-12 19:59:27,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:27,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769064269] [2021-06-12 19:59:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:27,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769064269] [2021-06-12 19:59:27,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769064269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:27,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045655581] [2021-06-12 19:59:27,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:27,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:59:27,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:27,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:27,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:27,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:27,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:27,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:27,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:27,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:28,000 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:28,000 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:28,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:28,001 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:28,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045655581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:28,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:28,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:28,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514876932] [2021-06-12 19:59:28,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:28,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:28,074 INFO L87 Difference]: Start difference. First operand 1643 states and 4843 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:29,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:29,280 INFO L93 Difference]: Finished difference Result 2455 states and 6834 transitions. [2021-06-12 19:59:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:59:29,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:29,283 INFO L225 Difference]: With dead ends: 2455 [2021-06-12 19:59:29,283 INFO L226 Difference]: Without dead ends: 2444 [2021-06-12 19:59:29,283 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1028.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1929, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:59:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-12 19:59:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1649. [2021-06-12 19:59:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.949635922330097) internal successors, (4861), 1648 states have internal predecessors, (4861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4861 transitions. [2021-06-12 19:59:29,302 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4861 transitions. Word has length 19 [2021-06-12 19:59:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:29,302 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 4861 transitions. [2021-06-12 19:59:29,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4861 transitions. [2021-06-12 19:59:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:29,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:29,304 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:29,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:29,504 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -166281384, now seen corresponding path program 402 times [2021-06-12 19:59:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:29,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201333328] [2021-06-12 19:59:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:29,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:29,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201333328] [2021-06-12 19:59:29,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201333328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532000431] [2021-06-12 19:59:29,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:29,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:29,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:29,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:29,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:29,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:29,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:29,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:29,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:29,851 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:29,851 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:29,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:29,852 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:29,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532000431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:29,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:29,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:29,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093305806] [2021-06-12 19:59:29,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:29,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:29,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:29,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:29,905 INFO L87 Difference]: Start difference. First operand 1649 states and 4861 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:30,682 INFO L93 Difference]: Finished difference Result 2425 states and 6791 transitions. [2021-06-12 19:59:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:59:30,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:30,685 INFO L225 Difference]: With dead ends: 2425 [2021-06-12 19:59:30,685 INFO L226 Difference]: Without dead ends: 2425 [2021-06-12 19:59:30,685 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:59:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-12 19:59:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1644. [2021-06-12 19:59:30,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1643 states have (on average 2.945830797321972) internal successors, (4840), 1643 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 4840 transitions. [2021-06-12 19:59:30,703 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 4840 transitions. Word has length 19 [2021-06-12 19:59:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:30,703 INFO L482 AbstractCegarLoop]: Abstraction has 1644 states and 4840 transitions. [2021-06-12 19:59:30,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 4840 transitions. [2021-06-12 19:59:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:30,705 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:30,705 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:30,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3602 [2021-06-12 19:59:30,905 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:30,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:30,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1876894692, now seen corresponding path program 403 times [2021-06-12 19:59:30,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:30,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150118870] [2021-06-12 19:59:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:30,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:31,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150118870] [2021-06-12 19:59:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150118870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164003545] [2021-06-12 19:59:31,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:31,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:31,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:31,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,243 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:59:31,243 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:31,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:31,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:59:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:31,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164003545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:31,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:31,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:31,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644650308] [2021-06-12 19:59:31,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:31,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:31,267 INFO L87 Difference]: Start difference. First operand 1644 states and 4840 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:32,043 INFO L93 Difference]: Finished difference Result 2501 states and 6947 transitions. [2021-06-12 19:59:32,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:59:32,043 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:32,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:32,046 INFO L225 Difference]: With dead ends: 2501 [2021-06-12 19:59:32,046 INFO L226 Difference]: Without dead ends: 2501 [2021-06-12 19:59:32,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:59:32,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-12 19:59:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 1656. [2021-06-12 19:59:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.950453172205438) internal successors, (4883), 1655 states have internal predecessors, (4883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4883 transitions. [2021-06-12 19:59:32,066 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4883 transitions. Word has length 19 [2021-06-12 19:59:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:32,066 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4883 transitions. [2021-06-12 19:59:32,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:32,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4883 transitions. [2021-06-12 19:59:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:32,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:32,067 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:32,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3606,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:32,268 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:32,268 INFO L82 PathProgramCache]: Analyzing trace with hash 928667608, now seen corresponding path program 404 times [2021-06-12 19:59:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:32,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207270298] [2021-06-12 19:59:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:32,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207270298] [2021-06-12 19:59:32,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207270298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445923186] [2021-06-12 19:59:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:32,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:32,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:32,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:32,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:32,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:32,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,595 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:59:32,595 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:32,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:32,596 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:59:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:32,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445923186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:32,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:32,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:32,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722187025] [2021-06-12 19:59:32,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:32,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:32,618 INFO L87 Difference]: Start difference. First operand 1656 states and 4883 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:34,028 INFO L93 Difference]: Finished difference Result 2631 states and 7221 transitions. [2021-06-12 19:59:34,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 19:59:34,028 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:34,031 INFO L225 Difference]: With dead ends: 2631 [2021-06-12 19:59:34,031 INFO L226 Difference]: Without dead ends: 2631 [2021-06-12 19:59:34,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1242.3ms TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 19:59:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-06-12 19:59:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1677. [2021-06-12 19:59:34,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 2.95763723150358) internal successors, (4957), 1676 states have internal predecessors, (4957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 4957 transitions. [2021-06-12 19:59:34,050 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 4957 transitions. Word has length 19 [2021-06-12 19:59:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:34,050 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 4957 transitions. [2021-06-12 19:59:34,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 4957 transitions. [2021-06-12 19:59:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:34,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:34,051 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:34,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-12 19:59:34,252 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2001752988, now seen corresponding path program 405 times [2021-06-12 19:59:34,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:34,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439416538] [2021-06-12 19:59:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:34,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439416538] [2021-06-12 19:59:34,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439416538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284683782] [2021-06-12 19:59:34,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:34,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:34,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:34,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:34,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:34,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:34,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:34,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,567 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:59:34,568 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:34,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:34,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:59:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:34,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284683782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:34,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:34,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:34,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677555853] [2021-06-12 19:59:34,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:34,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:34,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:34,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:34,591 INFO L87 Difference]: Start difference. First operand 1677 states and 4957 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:35,440 INFO L93 Difference]: Finished difference Result 2498 states and 7046 transitions. [2021-06-12 19:59:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:59:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:35,443 INFO L225 Difference]: With dead ends: 2498 [2021-06-12 19:59:35,443 INFO L226 Difference]: Without dead ends: 2498 [2021-06-12 19:59:35,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 693.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:59:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-12 19:59:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 1679. [2021-06-12 19:59:35,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.957687723480334) internal successors, (4963), 1678 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4963 transitions. [2021-06-12 19:59:35,463 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4963 transitions. Word has length 19 [2021-06-12 19:59:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:35,463 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4963 transitions. [2021-06-12 19:59:35,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4963 transitions. [2021-06-12 19:59:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:35,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:35,464 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:35,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3612,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:35,665 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash 907661400, now seen corresponding path program 406 times [2021-06-12 19:59:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:35,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014051891] [2021-06-12 19:59:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:35,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:35,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014051891] [2021-06-12 19:59:35,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014051891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:35,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902839409] [2021-06-12 19:59:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:35,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:35,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:35,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:35,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:35,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:35,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,984 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:59:35,984 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:35,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:35,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:59:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:36,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902839409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:36,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:36,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443958853] [2021-06-12 19:59:36,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:36,008 INFO L87 Difference]: Start difference. First operand 1679 states and 4963 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:36,222 INFO L93 Difference]: Finished difference Result 2398 states and 6821 transitions. [2021-06-12 19:59:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:59:36,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:36,224 INFO L225 Difference]: With dead ends: 2398 [2021-06-12 19:59:36,224 INFO L226 Difference]: Without dead ends: 2398 [2021-06-12 19:59:36,224 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-06-12 19:59:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1679. [2021-06-12 19:59:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 2.957687723480334) internal successors, (4963), 1678 states have internal predecessors, (4963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 4963 transitions. [2021-06-12 19:59:36,243 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 4963 transitions. Word has length 19 [2021-06-12 19:59:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:36,243 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 4963 transitions. [2021-06-12 19:59:36,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 4963 transitions. [2021-06-12 19:59:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:36,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:36,245 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:36,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3615,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:36,445 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:36,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:36,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2048945378, now seen corresponding path program 407 times [2021-06-12 19:59:36,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:36,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121343752] [2021-06-12 19:59:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:36,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:36,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121343752] [2021-06-12 19:59:36,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121343752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590174834] [2021-06-12 19:59:36,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:36,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:59:36,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:36,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:36,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:36,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:36,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:36,697 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,715 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 19:59:36,715 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:36,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:36,715 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 19:59:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:36,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590174834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:36,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:36,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:36,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678839667] [2021-06-12 19:59:36,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:36,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:36,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:36,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:36,739 INFO L87 Difference]: Start difference. First operand 1679 states and 4963 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:37,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:37,267 INFO L93 Difference]: Finished difference Result 2275 states and 6399 transitions. [2021-06-12 19:59:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:59:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:37,269 INFO L225 Difference]: With dead ends: 2275 [2021-06-12 19:59:37,269 INFO L226 Difference]: Without dead ends: 2275 [2021-06-12 19:59:37,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:59:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-12 19:59:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1869. [2021-06-12 19:59:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.975374732334047) internal successors, (5558), 1868 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:37,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5558 transitions. [2021-06-12 19:59:37,297 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5558 transitions. Word has length 19 [2021-06-12 19:59:37,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:37,297 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 5558 transitions. [2021-06-12 19:59:37,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5558 transitions. [2021-06-12 19:59:37,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:37,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:37,299 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:37,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3618 [2021-06-12 19:59:37,499 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1326321210, now seen corresponding path program 408 times [2021-06-12 19:59:37,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:37,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633764326] [2021-06-12 19:59:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:37,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:37,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633764326] [2021-06-12 19:59:37,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633764326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163179150] [2021-06-12 19:59:37,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:37,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:59:37,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:37,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:37,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:37,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:37,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:37,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:37,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:37,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:37,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:37,759 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,760 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 19:59:37,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:37,787 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 19:59:37,787 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:37,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:37,788 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 19:59:37,820 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:37,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163179150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:37,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:37,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:37,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786053146] [2021-06-12 19:59:37,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:37,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:37,820 INFO L87 Difference]: Start difference. First operand 1869 states and 5558 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:38,426 INFO L93 Difference]: Finished difference Result 2176 states and 6183 transitions. [2021-06-12 19:59:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:59:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:38,429 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 19:59:38,429 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 19:59:38,429 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:59:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 19:59:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1869. [2021-06-12 19:59:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 2.96948608137045) internal successors, (5547), 1868 states have internal predecessors, (5547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 5547 transitions. [2021-06-12 19:59:38,448 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 5547 transitions. Word has length 19 [2021-06-12 19:59:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:38,448 INFO L482 AbstractCegarLoop]: Abstraction has 1869 states and 5547 transitions. [2021-06-12 19:59:38,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 5547 transitions. [2021-06-12 19:59:38,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:38,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:38,450 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:38,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3620,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:38,651 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:38,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:38,651 INFO L82 PathProgramCache]: Analyzing trace with hash -2041214980, now seen corresponding path program 409 times [2021-06-12 19:59:38,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:38,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597429475] [2021-06-12 19:59:38,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:38,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597429475] [2021-06-12 19:59:38,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597429475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:38,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665798239] [2021-06-12 19:59:38,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:38,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:38,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:38,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:38,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:38,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:38,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:38,913 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:38,945 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:38,946 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:38,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:38,946 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:39,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665798239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:39,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:39,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:39,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351719625] [2021-06-12 19:59:39,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:39,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:39,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:39,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:39,003 INFO L87 Difference]: Start difference. First operand 1869 states and 5547 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:39,816 INFO L93 Difference]: Finished difference Result 2281 states and 6397 transitions. [2021-06-12 19:59:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 19:59:39,816 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:39,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:39,818 INFO L225 Difference]: With dead ends: 2281 [2021-06-12 19:59:39,818 INFO L226 Difference]: Without dead ends: 2280 [2021-06-12 19:59:39,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 505.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:59:39,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-12 19:59:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1877. [2021-06-12 19:59:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1877 states, 1876 states have (on average 2.9738805970149254) internal successors, (5579), 1876 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1877 states to 1877 states and 5579 transitions. [2021-06-12 19:59:39,838 INFO L78 Accepts]: Start accepts. Automaton has 1877 states and 5579 transitions. Word has length 19 [2021-06-12 19:59:39,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:39,838 INFO L482 AbstractCegarLoop]: Abstraction has 1877 states and 5579 transitions. [2021-06-12 19:59:39,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1877 states and 5579 transitions. [2021-06-12 19:59:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:39,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:39,840 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:40,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3625 [2021-06-12 19:59:40,040 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:40,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:40,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1239598752, now seen corresponding path program 410 times [2021-06-12 19:59:40,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:40,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588779277] [2021-06-12 19:59:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:40,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:40,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588779277] [2021-06-12 19:59:40,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588779277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677919684] [2021-06-12 19:59:40,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:40,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:40,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:40,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:40,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:40,282 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:40,285 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:40,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:40,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:40,320 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:40,320 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:40,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:40,321 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:40,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677919684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:40,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:40,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:40,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980976763] [2021-06-12 19:59:40,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:40,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:40,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:40,392 INFO L87 Difference]: Start difference. First operand 1877 states and 5579 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:41,429 INFO L93 Difference]: Finished difference Result 2324 states and 6523 transitions. [2021-06-12 19:59:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 19:59:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:41,432 INFO L225 Difference]: With dead ends: 2324 [2021-06-12 19:59:41,432 INFO L226 Difference]: Without dead ends: 2320 [2021-06-12 19:59:41,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 784.7ms TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 19:59:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-06-12 19:59:41,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1900. [2021-06-12 19:59:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1900 states, 1899 states have (on average 2.9768299104791995) internal successors, (5653), 1899 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1900 states to 1900 states and 5653 transitions. [2021-06-12 19:59:41,452 INFO L78 Accepts]: Start accepts. Automaton has 1900 states and 5653 transitions. Word has length 19 [2021-06-12 19:59:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:41,452 INFO L482 AbstractCegarLoop]: Abstraction has 1900 states and 5653 transitions. [2021-06-12 19:59:41,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1900 states and 5653 transitions. [2021-06-12 19:59:41,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:41,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:41,454 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:41,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3629 [2021-06-12 19:59:41,654 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:41,655 INFO L82 PathProgramCache]: Analyzing trace with hash 478744954, now seen corresponding path program 411 times [2021-06-12 19:59:41,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:41,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791543330] [2021-06-12 19:59:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791543330] [2021-06-12 19:59:41,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791543330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110473496] [2021-06-12 19:59:41,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:41,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:59:41,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:41,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:41,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:41,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:41,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:41,908 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:41,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:41,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:41,943 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:41,943 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:41,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:41,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110473496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:41,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:41,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:41,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301885445] [2021-06-12 19:59:41,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:41,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:41,995 INFO L87 Difference]: Start difference. First operand 1900 states and 5653 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:42,788 INFO L93 Difference]: Finished difference Result 2307 states and 6474 transitions. [2021-06-12 19:59:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 19:59:42,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:42,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:42,791 INFO L225 Difference]: With dead ends: 2307 [2021-06-12 19:59:42,791 INFO L226 Difference]: Without dead ends: 2307 [2021-06-12 19:59:42,791 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:59:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-12 19:59:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1863. [2021-06-12 19:59:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.9667024704618687) internal successors, (5524), 1862 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5524 transitions. [2021-06-12 19:59:42,810 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5524 transitions. Word has length 19 [2021-06-12 19:59:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:42,810 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5524 transitions. [2021-06-12 19:59:42,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5524 transitions. [2021-06-12 19:59:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:42,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:42,812 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:43,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3634,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:43,012 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1923098790, now seen corresponding path program 412 times [2021-06-12 19:59:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:43,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036669933] [2021-06-12 19:59:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:43,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036669933] [2021-06-12 19:59:43,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036669933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857970064] [2021-06-12 19:59:43,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:43,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:43,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:43,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:43,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:43,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:43,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:43,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:43,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:43,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:43,282 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:43,282 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:43,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:43,283 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:43,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857970064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:43,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:43,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:43,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555279568] [2021-06-12 19:59:43,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:43,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:43,346 INFO L87 Difference]: Start difference. First operand 1863 states and 5524 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:44,391 INFO L93 Difference]: Finished difference Result 2314 states and 6477 transitions. [2021-06-12 19:59:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 19:59:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:44,393 INFO L225 Difference]: With dead ends: 2314 [2021-06-12 19:59:44,393 INFO L226 Difference]: Without dead ends: 2309 [2021-06-12 19:59:44,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=242, Invalid=2620, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 19:59:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2021-06-12 19:59:44,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 1904. [2021-06-12 19:59:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1904 states, 1903 states have (on average 2.974776668418287) internal successors, (5661), 1903 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1904 states to 1904 states and 5661 transitions. [2021-06-12 19:59:44,413 INFO L78 Accepts]: Start accepts. Automaton has 1904 states and 5661 transitions. Word has length 19 [2021-06-12 19:59:44,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:44,413 INFO L482 AbstractCegarLoop]: Abstraction has 1904 states and 5661 transitions. [2021-06-12 19:59:44,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1904 states and 5661 transitions. [2021-06-12 19:59:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:44,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:44,415 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:44,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-12 19:59:44,615 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:44,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -194051456, now seen corresponding path program 413 times [2021-06-12 19:59:44,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:44,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240537149] [2021-06-12 19:59:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:44,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240537149] [2021-06-12 19:59:44,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240537149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324104633] [2021-06-12 19:59:44,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:44,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:59:44,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:44,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:44,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:44,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:44,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:44,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:44,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:44,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:44,915 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:44,918 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:44,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:44,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:44,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:44,953 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:59:44,953 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:44,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:44,954 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:59:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:44,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324104633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:44,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:44,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:44,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335153532] [2021-06-12 19:59:44,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:44,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:44,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:44,981 INFO L87 Difference]: Start difference. First operand 1904 states and 5661 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:45,645 INFO L93 Difference]: Finished difference Result 2210 states and 6281 transitions. [2021-06-12 19:59:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:59:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:45,648 INFO L225 Difference]: With dead ends: 2210 [2021-06-12 19:59:45,648 INFO L226 Difference]: Without dead ends: 2202 [2021-06-12 19:59:45,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:59:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-12 19:59:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1908. [2021-06-12 19:59:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 2.966439433665443) internal successors, (5657), 1907 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 5657 transitions. [2021-06-12 19:59:45,667 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 5657 transitions. Word has length 19 [2021-06-12 19:59:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 1908 states and 5657 transitions. [2021-06-12 19:59:45,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 5657 transitions. [2021-06-12 19:59:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:45,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:45,669 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:45,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:45,869 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:45,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1573693946, now seen corresponding path program 414 times [2021-06-12 19:59:45,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:45,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685701308] [2021-06-12 19:59:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:45,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685701308] [2021-06-12 19:59:45,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685701308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:45,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277711619] [2021-06-12 19:59:45,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:45,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:59:45,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:45,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:46,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:46,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:46,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:46,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,155 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:59:46,155 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:46,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:46,156 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:59:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:46,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277711619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:46,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:46,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:46,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465682574] [2021-06-12 19:59:46,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:46,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:46,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:46,177 INFO L87 Difference]: Start difference. First operand 1908 states and 5657 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:46,932 INFO L93 Difference]: Finished difference Result 2517 states and 6946 transitions. [2021-06-12 19:59:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:59:46,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:46,935 INFO L225 Difference]: With dead ends: 2517 [2021-06-12 19:59:46,935 INFO L226 Difference]: Without dead ends: 2517 [2021-06-12 19:59:46,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:59:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-06-12 19:59:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1947. [2021-06-12 19:59:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1946 states have (on average 2.9676258992805757) internal successors, (5775), 1946 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 5775 transitions. [2021-06-12 19:59:46,962 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 5775 transitions. Word has length 19 [2021-06-12 19:59:46,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:46,962 INFO L482 AbstractCegarLoop]: Abstraction has 1947 states and 5775 transitions. [2021-06-12 19:59:46,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:46,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 5775 transitions. [2021-06-12 19:59:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:46,964 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:46,964 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:47,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3651,419 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:47,164 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash -850013410, now seen corresponding path program 415 times [2021-06-12 19:59:47,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:47,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004374086] [2021-06-12 19:59:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:47,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004374086] [2021-06-12 19:59:47,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004374086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211262904] [2021-06-12 19:59:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:47,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:47,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:47,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:47,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:47,407 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:47,410 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:47,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:47,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:47,444 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:47,444 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:47,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:47,445 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211262904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:47,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:47,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850979551] [2021-06-12 19:59:47,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:47,510 INFO L87 Difference]: Start difference. First operand 1947 states and 5775 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:48,191 INFO L93 Difference]: Finished difference Result 2360 states and 6719 transitions. [2021-06-12 19:59:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:59:48,191 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:48,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:48,194 INFO L225 Difference]: With dead ends: 2360 [2021-06-12 19:59:48,194 INFO L226 Difference]: Without dead ends: 2356 [2021-06-12 19:59:48,194 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:59:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-12 19:59:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2033. [2021-06-12 19:59:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 2032 states have (on average 2.979330708661417) internal successors, (6054), 2032 states have internal predecessors, (6054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 6054 transitions. [2021-06-12 19:59:48,216 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 6054 transitions. Word has length 19 [2021-06-12 19:59:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:48,216 INFO L482 AbstractCegarLoop]: Abstraction has 2033 states and 6054 transitions. [2021-06-12 19:59:48,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 6054 transitions. [2021-06-12 19:59:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:48,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:48,218 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:48,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:48,419 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:48,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash 879033924, now seen corresponding path program 416 times [2021-06-12 19:59:48,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:48,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200958363] [2021-06-12 19:59:48,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:48,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:48,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200958363] [2021-06-12 19:59:48,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200958363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818852248] [2021-06-12 19:59:48,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:48,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:48,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:48,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:48,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:48,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:48,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:48,728 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:48,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:48,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:48,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:48,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:48,765 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:59:48,766 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:48,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:48,767 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:59:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:48,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818852248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:48,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:48,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:48,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398850185] [2021-06-12 19:59:48,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:48,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:48,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:48,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:48,794 INFO L87 Difference]: Start difference. First operand 2033 states and 6054 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:49,408 INFO L93 Difference]: Finished difference Result 2349 states and 6703 transitions. [2021-06-12 19:59:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:59:49,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:49,411 INFO L225 Difference]: With dead ends: 2349 [2021-06-12 19:59:49,411 INFO L226 Difference]: Without dead ends: 2341 [2021-06-12 19:59:49,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:59:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2021-06-12 19:59:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 2045. [2021-06-12 19:59:49,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 2.9779843444227008) internal successors, (6087), 2044 states have internal predecessors, (6087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 6087 transitions. [2021-06-12 19:59:49,440 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 6087 transitions. Word has length 19 [2021-06-12 19:59:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:49,440 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 6087 transitions. [2021-06-12 19:59:49,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 6087 transitions. [2021-06-12 19:59:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:49,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:49,442 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:49,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3660 [2021-06-12 19:59:49,643 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1355073570, now seen corresponding path program 417 times [2021-06-12 19:59:49,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:49,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183348521] [2021-06-12 19:59:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:49,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183348521] [2021-06-12 19:59:49,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183348521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298169414] [2021-06-12 19:59:49,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:49,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:49,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:49,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:49,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:49,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:49,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:49,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:49,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:49,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:49,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:49,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:49,939 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:49,968 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:59:49,968 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:49,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:49,969 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:59:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:49,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298169414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:49,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:49,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:49,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619185778] [2021-06-12 19:59:49,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:49,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:49,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:49,997 INFO L87 Difference]: Start difference. First operand 2045 states and 6087 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:50,651 INFO L93 Difference]: Finished difference Result 2336 states and 6674 transitions. [2021-06-12 19:59:50,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:59:50,651 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:50,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:50,653 INFO L225 Difference]: With dead ends: 2336 [2021-06-12 19:59:50,653 INFO L226 Difference]: Without dead ends: 2324 [2021-06-12 19:59:50,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=146, Invalid=1336, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:59:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-06-12 19:59:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2053. [2021-06-12 19:59:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.9683235867446394) internal successors, (6091), 2052 states have internal predecessors, (6091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 6091 transitions. [2021-06-12 19:59:50,674 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 6091 transitions. Word has length 19 [2021-06-12 19:59:50,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:50,674 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 6091 transitions. [2021-06-12 19:59:50,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 6091 transitions. [2021-06-12 19:59:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:50,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:50,676 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:50,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3667,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:50,876 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1157374330, now seen corresponding path program 418 times [2021-06-12 19:59:50,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:50,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027670080] [2021-06-12 19:59:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:50,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:50,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027670080] [2021-06-12 19:59:50,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027670080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:50,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801611675] [2021-06-12 19:59:50,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:50,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:50,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:50,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:51,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:51,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:51,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:51,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,157 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:59:51,157 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:51,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:51,158 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:59:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:51,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801611675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:51,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:51,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:51,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422965235] [2021-06-12 19:59:51,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:51,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:51,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:51,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:51,180 INFO L87 Difference]: Start difference. First operand 2053 states and 6091 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:52,202 INFO L93 Difference]: Finished difference Result 2605 states and 7193 transitions. [2021-06-12 19:59:52,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:59:52,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:52,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:52,205 INFO L225 Difference]: With dead ends: 2605 [2021-06-12 19:59:52,205 INFO L226 Difference]: Without dead ends: 2601 [2021-06-12 19:59:52,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 646.4ms TimeCoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:59:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-12 19:59:52,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2058. [2021-06-12 19:59:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.9679144385026737) internal successors, (6105), 2057 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 6105 transitions. [2021-06-12 19:59:52,229 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 6105 transitions. Word has length 19 [2021-06-12 19:59:52,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:52,229 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 6105 transitions. [2021-06-12 19:59:52,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:52,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 6105 transitions. [2021-06-12 19:59:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:52,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:52,231 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:52,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:52,433 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1944104998, now seen corresponding path program 419 times [2021-06-12 19:59:52,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:52,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557737115] [2021-06-12 19:59:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:52,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557737115] [2021-06-12 19:59:52,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557737115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043708378] [2021-06-12 19:59:52,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:52,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:59:52,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:52,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:52,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:52,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:52,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:52,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:52,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:52,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:52,747 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:52,747 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:52,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:52,748 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:52,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043708378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:52,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:52,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:52,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633037965] [2021-06-12 19:59:52,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:52,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:52,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:52,812 INFO L87 Difference]: Start difference. First operand 2058 states and 6105 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:53,475 INFO L93 Difference]: Finished difference Result 2431 states and 6944 transitions. [2021-06-12 19:59:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 19:59:53,475 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:53,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:53,478 INFO L225 Difference]: With dead ends: 2431 [2021-06-12 19:59:53,478 INFO L226 Difference]: Without dead ends: 2427 [2021-06-12 19:59:53,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:59:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-12 19:59:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2116. [2021-06-12 19:59:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9749408983451535) internal successors, (6292), 2115 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6292 transitions. [2021-06-12 19:59:53,500 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6292 transitions. Word has length 19 [2021-06-12 19:59:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:53,500 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6292 transitions. [2021-06-12 19:59:53,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6292 transitions. [2021-06-12 19:59:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:53,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:53,502 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:53,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3677,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,702 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash -215057664, now seen corresponding path program 420 times [2021-06-12 19:59:53,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:53,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119651943] [2021-06-12 19:59:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:53,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:53,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119651943] [2021-06-12 19:59:53,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119651943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:53,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26385513] [2021-06-12 19:59:53,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:53,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:59:53,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:53,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:53,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:54,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:54,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:54,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:54,011 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:54,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:54,017 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:54,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:54,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:54,048 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:59:54,049 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:54,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:54,050 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:59:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26385513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:54,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:54,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176239900] [2021-06-12 19:59:54,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:54,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:54,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:54,077 INFO L87 Difference]: Start difference. First operand 2116 states and 6292 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:54,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:54,602 INFO L93 Difference]: Finished difference Result 2391 states and 6848 transitions. [2021-06-12 19:59:54,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:59:54,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:54,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:54,605 INFO L225 Difference]: With dead ends: 2391 [2021-06-12 19:59:54,605 INFO L226 Difference]: Without dead ends: 2383 [2021-06-12 19:59:54,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:59:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2021-06-12 19:59:54,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2116. [2021-06-12 19:59:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9735224586288416) internal successors, (6289), 2115 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6289 transitions. [2021-06-12 19:59:54,636 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6289 transitions. Word has length 19 [2021-06-12 19:59:54,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:54,636 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6289 transitions. [2021-06-12 19:59:54,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6289 transitions. [2021-06-12 19:59:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:54,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:54,638 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:54,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3683 [2021-06-12 19:59:54,838 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:54,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1845802138, now seen corresponding path program 421 times [2021-06-12 19:59:54,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:54,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137055933] [2021-06-12 19:59:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:54,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:54,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137055933] [2021-06-12 19:59:54,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137055933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:54,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114035367] [2021-06-12 19:59:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:54,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:55,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:55,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:55,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:55,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:55,143 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:55,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:55,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:55,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:55,178 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:59:55,178 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:55,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:55,179 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:59:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114035367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:55,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:55,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087036498] [2021-06-12 19:59:55,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:55,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:55,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:55,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:55,209 INFO L87 Difference]: Start difference. First operand 2116 states and 6289 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:55,668 INFO L93 Difference]: Finished difference Result 2342 states and 6772 transitions. [2021-06-12 19:59:55,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:59:55,668 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:55,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:55,670 INFO L225 Difference]: With dead ends: 2342 [2021-06-12 19:59:55,670 INFO L226 Difference]: Without dead ends: 2330 [2021-06-12 19:59:55,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:59:55,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-12 19:59:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2116. [2021-06-12 19:59:55,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9706855791962177) internal successors, (6283), 2115 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6283 transitions. [2021-06-12 19:59:55,691 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6283 transitions. Word has length 19 [2021-06-12 19:59:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:55,691 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6283 transitions. [2021-06-12 19:59:55,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:55,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6283 transitions. [2021-06-12 19:59:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:55,693 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:55,693 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:55,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3690,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:55,893 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:55,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1307946560, now seen corresponding path program 422 times [2021-06-12 19:59:55,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:55,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241921009] [2021-06-12 19:59:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:55,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:55,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241921009] [2021-06-12 19:59:55,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241921009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:55,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130079220] [2021-06-12 19:59:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:56,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:59:56,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:56,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:56,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:56,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:56,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:56,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:56,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 19:59:56,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 19:59:56,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:56,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:56,206 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:56,235 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 19:59:56,235 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:56,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 19:59:56,236 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 19:59:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:56,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130079220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:56,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:56,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:56,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471819489] [2021-06-12 19:59:56,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:56,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:56,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:56,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:56,265 INFO L87 Difference]: Start difference. First operand 2116 states and 6283 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:56,746 INFO L93 Difference]: Finished difference Result 2338 states and 6760 transitions. [2021-06-12 19:59:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:59:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:56,748 INFO L225 Difference]: With dead ends: 2338 [2021-06-12 19:59:56,748 INFO L226 Difference]: Without dead ends: 2322 [2021-06-12 19:59:56,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:59:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-06-12 19:59:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2118. [2021-06-12 19:59:56,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 2117 states have (on average 2.966461974492206) internal successors, (6280), 2117 states have internal predecessors, (6280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 6280 transitions. [2021-06-12 19:59:56,769 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 6280 transitions. Word has length 19 [2021-06-12 19:59:56,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:56,769 INFO L482 AbstractCegarLoop]: Abstraction has 2118 states and 6280 transitions. [2021-06-12 19:59:56,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:56,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 6280 transitions. [2021-06-12 19:59:56,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:56,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:56,771 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:56,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:56,971 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:56,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:56,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1136368122, now seen corresponding path program 423 times [2021-06-12 19:59:56,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:56,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191769838] [2021-06-12 19:59:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191769838] [2021-06-12 19:59:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191769838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34288317] [2021-06-12 19:59:57,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:57,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:59:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:57,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:57,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:57,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:57,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:57,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,271 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 19:59:57,272 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:57,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:59:57,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 19:59:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34288317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:57,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:57,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443794297] [2021-06-12 19:59:57,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:57,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:57,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:57,294 INFO L87 Difference]: Start difference. First operand 2118 states and 6280 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:57,588 INFO L93 Difference]: Finished difference Result 2384 states and 6857 transitions. [2021-06-12 19:59:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:59:57,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:57,591 INFO L225 Difference]: With dead ends: 2384 [2021-06-12 19:59:57,591 INFO L226 Difference]: Without dead ends: 2384 [2021-06-12 19:59:57,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 230.1ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-12 19:59:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2112. [2021-06-12 19:59:57,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.968261487446708) internal successors, (6266), 2111 states have internal predecessors, (6266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 6266 transitions. [2021-06-12 19:59:57,612 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 6266 transitions. Word has length 19 [2021-06-12 19:59:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:57,612 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 6266 transitions. [2021-06-12 19:59:57,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 6266 transitions. [2021-06-12 19:59:57,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:57,614 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:57,614 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:57,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3704,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:57,814 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1186240252, now seen corresponding path program 424 times [2021-06-12 19:59:57,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:57,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917257404] [2021-06-12 19:59:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:57,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:57,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917257404] [2021-06-12 19:59:57,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917257404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:57,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115632573] [2021-06-12 19:59:57,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:57,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:59:57,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:58,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:58,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:58,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:58,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:58,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,132 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:58,132 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:58,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:58,133 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:58,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115632573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:58,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:58,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696076715] [2021-06-12 19:59:58,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:58,185 INFO L87 Difference]: Start difference. First operand 2112 states and 6266 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:59:58,465 INFO L93 Difference]: Finished difference Result 2407 states and 6882 transitions. [2021-06-12 19:59:58,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:59:58,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 19:59:58,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:59:58,468 INFO L225 Difference]: With dead ends: 2407 [2021-06-12 19:59:58,468 INFO L226 Difference]: Without dead ends: 2407 [2021-06-12 19:59:58,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:59:58,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-12 19:59:58,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2123. [2021-06-12 19:59:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 2.9717247879359094) internal successors, (6306), 2122 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6306 transitions. [2021-06-12 19:59:58,489 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6306 transitions. Word has length 19 [2021-06-12 19:59:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:59:58,489 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 6306 transitions. [2021-06-12 19:59:58,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:59:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6306 transitions. [2021-06-12 19:59:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 19:59:58,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:59:58,491 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:59:58,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-06-12 19:59:58,691 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:59:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:59:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1987856480, now seen corresponding path program 425 times [2021-06-12 19:59:58,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:59:58,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619695125] [2021-06-12 19:59:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:59:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:59:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:58,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:59:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619695125] [2021-06-12 19:59:58,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619695125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:58,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430367312] [2021-06-12 19:59:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:59:58,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:59:58,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:59:58,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:59:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:59:58,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 19:59:58,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 19:59:58,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:58,976 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:58,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:59:58,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:59:58,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 19:59:59,010 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 19:59:59,011 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 19:59:59,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 19:59:59,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 19:59:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:59:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430367312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:59:59,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:59:59,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 19:59:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288219865] [2021-06-12 19:59:59,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:59:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:59:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:59:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:59:59,082 INFO L87 Difference]: Start difference. First operand 2123 states and 6306 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:00,198 INFO L93 Difference]: Finished difference Result 2434 states and 6929 transitions. [2021-06-12 20:00:00,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:00:00,199 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:00,201 INFO L225 Difference]: With dead ends: 2434 [2021-06-12 20:00:00,201 INFO L226 Difference]: Without dead ends: 2422 [2021-06-12 20:00:00,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 875.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:00:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-12 20:00:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2130. [2021-06-12 20:00:00,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 2.971817754814467) internal successors, (6327), 2129 states have internal predecessors, (6327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:00,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 6327 transitions. [2021-06-12 20:00:00,222 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 6327 transitions. Word has length 19 [2021-06-12 20:00:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:00,223 INFO L482 AbstractCegarLoop]: Abstraction has 2130 states and 6327 transitions. [2021-06-12 20:00:00,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:00,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 6327 transitions. [2021-06-12 20:00:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:00,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:00,224 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:00,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:00,425 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash -588767110, now seen corresponding path program 426 times [2021-06-12 20:00:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:00,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116995485] [2021-06-12 20:00:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116995485] [2021-06-12 20:00:00,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116995485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508499767] [2021-06-12 20:00:00,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:00,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:00,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:00,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:00,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:00,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:00,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:00,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:00,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:00,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:00,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:00,783 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:00,783 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:00,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:00,784 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:00,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508499767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:00,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:00,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:00:00,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198988053] [2021-06-12 20:00:00,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:00,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:00,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:00,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:00,837 INFO L87 Difference]: Start difference. First operand 2130 states and 6327 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:01,688 INFO L93 Difference]: Finished difference Result 2403 states and 6885 transitions. [2021-06-12 20:00:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:00:01,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:01,691 INFO L225 Difference]: With dead ends: 2403 [2021-06-12 20:00:01,691 INFO L226 Difference]: Without dead ends: 2403 [2021-06-12 20:00:01,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-06-12 20:00:01,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2116. [2021-06-12 20:00:01,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 2115 states have (on average 2.9673758865248225) internal successors, (6276), 2115 states have internal predecessors, (6276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 6276 transitions. [2021-06-12 20:00:01,713 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 6276 transitions. Word has length 19 [2021-06-12 20:00:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:01,713 INFO L482 AbstractCegarLoop]: Abstraction has 2116 states and 6276 transitions. [2021-06-12 20:00:01,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 6276 transitions. [2021-06-12 20:00:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:01,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:01,715 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:01,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3716 [2021-06-12 20:00:01,931 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:01,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1995586878, now seen corresponding path program 427 times [2021-06-12 20:00:01,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:01,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12701306] [2021-06-12 20:00:01,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12701306] [2021-06-12 20:00:02,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12701306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945167984] [2021-06-12 20:00:02,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:02,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:02,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:02,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:02,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:02,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:02,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,305 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:02,305 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:02,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:02,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:02,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945167984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:02,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:02,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:00:02,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652918213] [2021-06-12 20:00:02,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:02,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:02,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:02,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:02,331 INFO L87 Difference]: Start difference. First operand 2116 states and 6276 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:03,304 INFO L93 Difference]: Finished difference Result 2466 states and 7001 transitions. [2021-06-12 20:00:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:00:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:03,307 INFO L225 Difference]: With dead ends: 2466 [2021-06-12 20:00:03,307 INFO L226 Difference]: Without dead ends: 2466 [2021-06-12 20:00:03,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:00:03,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-12 20:00:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2117. [2021-06-12 20:00:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.967391304347826) internal successors, (6279), 2116 states have internal predecessors, (6279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6279 transitions. [2021-06-12 20:00:03,330 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6279 transitions. Word has length 19 [2021-06-12 20:00:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:03,330 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6279 transitions. [2021-06-12 20:00:03,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:03,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6279 transitions. [2021-06-12 20:00:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:03,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:03,332 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:03,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3720,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:03,533 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:03,533 INFO L82 PathProgramCache]: Analyzing trace with hash 506181882, now seen corresponding path program 428 times [2021-06-12 20:00:03,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:03,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513108736] [2021-06-12 20:00:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:03,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:03,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513108736] [2021-06-12 20:00:03,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513108736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:03,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445346882] [2021-06-12 20:00:03,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:03,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:03,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:03,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:03,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:03,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:03,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:03,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:03,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,893 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:03,893 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:03,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:03,894 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:03,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445346882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:03,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:03,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:00:03,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568167565] [2021-06-12 20:00:03,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:03,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:03,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:03,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:03,920 INFO L87 Difference]: Start difference. First operand 2117 states and 6279 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:05,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:05,524 INFO L93 Difference]: Finished difference Result 2572 states and 7203 transitions. [2021-06-12 20:00:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:00:05,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:05,527 INFO L225 Difference]: With dead ends: 2572 [2021-06-12 20:00:05,527 INFO L226 Difference]: Without dead ends: 2572 [2021-06-12 20:00:05,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1416.0ms TimeCoverageRelationStatistics Valid=411, Invalid=3371, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:00:05,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2021-06-12 20:00:05,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 2113. [2021-06-12 20:00:05,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.968276515151515) internal successors, (6269), 2112 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 6269 transitions. [2021-06-12 20:00:05,549 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 6269 transitions. Word has length 19 [2021-06-12 20:00:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:05,549 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 6269 transitions. [2021-06-12 20:00:05,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 6269 transitions. [2021-06-12 20:00:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:05,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:05,551 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:05,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,752 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1579267262, now seen corresponding path program 429 times [2021-06-12 20:00:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:05,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747914081] [2021-06-12 20:00:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:05,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:05,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747914081] [2021-06-12 20:00:05,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747914081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:05,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005244577] [2021-06-12 20:00:05,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:05,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:05,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:05,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:06,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:06,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:06,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:06,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,092 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:06,092 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:06,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:06,093 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:06,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005244577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:06,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:06,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:00:06,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189170106] [2021-06-12 20:00:06,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:06,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:06,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:06,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:06,116 INFO L87 Difference]: Start difference. First operand 2113 states and 6269 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:07,133 INFO L93 Difference]: Finished difference Result 2426 states and 6972 transitions. [2021-06-12 20:00:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:00:07,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:07,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:07,136 INFO L225 Difference]: With dead ends: 2426 [2021-06-12 20:00:07,136 INFO L226 Difference]: Without dead ends: 2426 [2021-06-12 20:00:07,136 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:00:07,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-12 20:00:07,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2115. [2021-06-12 20:00:07,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2114 states have (on average 2.968306527909177) internal successors, (6275), 2114 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 6275 transitions. [2021-06-12 20:00:07,158 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 6275 transitions. Word has length 19 [2021-06-12 20:00:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:07,158 INFO L482 AbstractCegarLoop]: Abstraction has 2115 states and 6275 transitions. [2021-06-12 20:00:07,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 6275 transitions. [2021-06-12 20:00:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:07,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:07,160 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:07,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3726,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:07,376 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash 485175674, now seen corresponding path program 430 times [2021-06-12 20:00:07,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:07,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128454991] [2021-06-12 20:00:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128454991] [2021-06-12 20:00:07,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128454991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354047850] [2021-06-12 20:00:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:07,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:07,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:07,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:07,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:07,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:07,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:07,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:07,725 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,752 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:07,752 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:07,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:07,753 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:07,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354047850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:07,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:07,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:00:07,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351911990] [2021-06-12 20:00:07,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:07,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:07,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:07,780 INFO L87 Difference]: Start difference. First operand 2115 states and 6275 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:08,097 INFO L93 Difference]: Finished difference Result 2351 states and 6795 transitions. [2021-06-12 20:00:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:00:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:08,100 INFO L225 Difference]: With dead ends: 2351 [2021-06-12 20:00:08,100 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 20:00:08,100 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 20:00:08,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2117. [2021-06-12 20:00:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 2.9683364839319473) internal successors, (6281), 2116 states have internal predecessors, (6281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 6281 transitions. [2021-06-12 20:00:08,123 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 6281 transitions. Word has length 19 [2021-06-12 20:00:08,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:08,123 INFO L482 AbstractCegarLoop]: Abstraction has 2117 states and 6281 transitions. [2021-06-12 20:00:08,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:08,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 6281 transitions. [2021-06-12 20:00:08,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:08,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:08,125 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:08,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3729 [2021-06-12 20:00:08,337 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash 527359578, now seen corresponding path program 431 times [2021-06-12 20:00:08,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:08,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918860139] [2021-06-12 20:00:08,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:08,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:08,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918860139] [2021-06-12 20:00:08,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918860139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:08,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379086061] [2021-06-12 20:00:08,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:08,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:00:08,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:08,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:08,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:08,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:08,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:08,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,655 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:00:08,656 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:08,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:08,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:00:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:08,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379086061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:08,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:08,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:08,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18778882] [2021-06-12 20:00:08,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:08,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:08,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:08,681 INFO L87 Difference]: Start difference. First operand 2117 states and 6281 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:09,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:09,259 INFO L93 Difference]: Finished difference Result 2538 states and 7280 transitions. [2021-06-12 20:00:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:00:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:09,262 INFO L225 Difference]: With dead ends: 2538 [2021-06-12 20:00:09,262 INFO L226 Difference]: Without dead ends: 2538 [2021-06-12 20:00:09,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:00:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2021-06-12 20:00:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2253. [2021-06-12 20:00:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.9871225577264653) internal successors, (6727), 2252 states have internal predecessors, (6727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6727 transitions. [2021-06-12 20:00:09,289 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6727 transitions. Word has length 19 [2021-06-12 20:00:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:09,290 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6727 transitions. [2021-06-12 20:00:09,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6727 transitions. [2021-06-12 20:00:09,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:09,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:09,292 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:09,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3732,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:09,508 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2081408702, now seen corresponding path program 432 times [2021-06-12 20:00:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:09,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065336532] [2021-06-12 20:00:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:09,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:09,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065336532] [2021-06-12 20:00:09,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065336532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:09,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939713763] [2021-06-12 20:00:09,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:09,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:09,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:09,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:09,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:09,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:09,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:09,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:09,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:09,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,891 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:09,892 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:09,895 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:09,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:09,933 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:00:09,933 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:09,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:09,934 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:00:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:10,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939713763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:10,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:10,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:10,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511974794] [2021-06-12 20:00:10,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:10,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:10,011 INFO L87 Difference]: Start difference. First operand 2253 states and 6727 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,265 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2021-06-12 20:00:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:10,836 INFO L93 Difference]: Finished difference Result 2409 states and 6994 transitions. [2021-06-12 20:00:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:00:10,836 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:10,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:10,839 INFO L225 Difference]: With dead ends: 2409 [2021-06-12 20:00:10,839 INFO L226 Difference]: Without dead ends: 2403 [2021-06-12 20:00:10,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 747.3ms TimeCoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:00:10,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-06-12 20:00:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 2255. [2021-06-12 20:00:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2254 states have (on average 2.9835847382431235) internal successors, (6725), 2254 states have internal predecessors, (6725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 6725 transitions. [2021-06-12 20:00:10,866 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 6725 transitions. Word has length 19 [2021-06-12 20:00:10,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:10,866 INFO L482 AbstractCegarLoop]: Abstraction has 2255 states and 6725 transitions. [2021-06-12 20:00:10,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 6725 transitions. [2021-06-12 20:00:10,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:10,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:10,868 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:11,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3734,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:11,085 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash 767001916, now seen corresponding path program 433 times [2021-06-12 20:00:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944409883] [2021-06-12 20:00:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:11,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:11,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944409883] [2021-06-12 20:00:11,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944409883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689029330] [2021-06-12 20:00:11,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:11,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:11,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:11,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:11,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:11,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:11,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,535 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:00:11,535 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:11,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:11,536 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:00:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:11,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689029330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:11,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:11,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:11,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427132] [2021-06-12 20:00:11,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:11,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:11,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:11,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:11,563 INFO L87 Difference]: Start difference. First operand 2255 states and 6725 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:12,805 INFO L93 Difference]: Finished difference Result 2634 states and 7517 transitions. [2021-06-12 20:00:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:00:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:12,809 INFO L225 Difference]: With dead ends: 2634 [2021-06-12 20:00:12,809 INFO L226 Difference]: Without dead ends: 2632 [2021-06-12 20:00:12,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1048.2ms TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:00:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-06-12 20:00:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2294. [2021-06-12 20:00:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 2.988661142607937) internal successors, (6853), 2293 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 6853 transitions. [2021-06-12 20:00:12,838 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 6853 transitions. Word has length 19 [2021-06-12 20:00:12,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:12,838 INFO L482 AbstractCegarLoop]: Abstraction has 2294 states and 6853 transitions. [2021-06-12 20:00:12,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 6853 transitions. [2021-06-12 20:00:12,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:12,840 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:12,840 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:13,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-06-12 20:00:13,057 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:13,057 INFO L82 PathProgramCache]: Analyzing trace with hash -152698792, now seen corresponding path program 434 times [2021-06-12 20:00:13,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:13,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047470155] [2021-06-12 20:00:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:13,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047470155] [2021-06-12 20:00:13,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047470155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550928195] [2021-06-12 20:00:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:13,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:13,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:13,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:13,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:13,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:13,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:13,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:13,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:13,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:00:13,433 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:13,461 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:00:13,461 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:13,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:13,462 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:00:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:13,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550928195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:13,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:13,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:13,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815149860] [2021-06-12 20:00:13,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:13,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:13,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:13,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:13,498 INFO L87 Difference]: Start difference. First operand 2294 states and 6853 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:14,490 INFO L93 Difference]: Finished difference Result 2456 states and 7146 transitions. [2021-06-12 20:00:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:00:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:14,493 INFO L225 Difference]: With dead ends: 2456 [2021-06-12 20:00:14,493 INFO L226 Difference]: Without dead ends: 2450 [2021-06-12 20:00:14,493 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 861.3ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:00:14,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-06-12 20:00:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2301. [2021-06-12 20:00:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 2.9808695652173913) internal successors, (6856), 2300 states have internal predecessors, (6856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 6856 transitions. [2021-06-12 20:00:14,540 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 6856 transitions. Word has length 19 [2021-06-12 20:00:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:14,540 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 6856 transitions. [2021-06-12 20:00:14,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 6856 transitions. [2021-06-12 20:00:14,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:14,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:14,543 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:14,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3741,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:14,753 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:14,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:14,753 INFO L82 PathProgramCache]: Analyzing trace with hash 774732314, now seen corresponding path program 435 times [2021-06-12 20:00:14,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:14,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12302874] [2021-06-12 20:00:14,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:14,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:14,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12302874] [2021-06-12 20:00:14,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12302874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:14,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510313694] [2021-06-12 20:00:14,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:14,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:00:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:14,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:15,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:15,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:15,050 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:15,054 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:15,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:15,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:15,114 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:15,114 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:15,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:15,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:15,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510313694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:15,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:15,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:15,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606269931] [2021-06-12 20:00:15,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:15,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:15,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:15,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:15,226 INFO L87 Difference]: Start difference. First operand 2301 states and 6856 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:16,448 INFO L93 Difference]: Finished difference Result 2657 states and 7535 transitions. [2021-06-12 20:00:16,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:00:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:16,453 INFO L225 Difference]: With dead ends: 2657 [2021-06-12 20:00:16,453 INFO L226 Difference]: Without dead ends: 2655 [2021-06-12 20:00:16,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=238, Invalid=2018, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:00:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2021-06-12 20:00:16,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 2288. [2021-06-12 20:00:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 2.979011805859204) internal successors, (6813), 2287 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 6813 transitions. [2021-06-12 20:00:16,484 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 6813 transitions. Word has length 19 [2021-06-12 20:00:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:16,484 INFO L482 AbstractCegarLoop]: Abstraction has 2288 states and 6813 transitions. [2021-06-12 20:00:16,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:16,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 6813 transitions. [2021-06-12 20:00:16,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:16,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:16,487 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:16,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3746,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:16,705 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1576348542, now seen corresponding path program 436 times [2021-06-12 20:00:16,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:16,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100153017] [2021-06-12 20:00:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:16,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100153017] [2021-06-12 20:00:16,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100153017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831382383] [2021-06-12 20:00:16,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:16,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:16,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:16,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:17,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:17,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:17,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:17,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:17,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:17,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:17,092 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:17,092 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:17,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:17,093 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:17,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831382383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:17,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:17,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:17,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470490519] [2021-06-12 20:00:17,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:17,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:17,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:17,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:17,176 INFO L87 Difference]: Start difference. First operand 2288 states and 6813 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:18,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:18,581 INFO L93 Difference]: Finished difference Result 2603 states and 7447 transitions. [2021-06-12 20:00:18,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 20:00:18,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:18,585 INFO L225 Difference]: With dead ends: 2603 [2021-06-12 20:00:18,585 INFO L226 Difference]: Without dead ends: 2598 [2021-06-12 20:00:18,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1211.7ms TimeCoverageRelationStatistics Valid=287, Invalid=2575, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:00:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2021-06-12 20:00:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 2308. [2021-06-12 20:00:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2308 states, 2307 states have (on average 2.979627221499783) internal successors, (6874), 2307 states have internal predecessors, (6874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6874 transitions. [2021-06-12 20:00:18,615 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6874 transitions. Word has length 19 [2021-06-12 20:00:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:18,615 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6874 transitions. [2021-06-12 20:00:18,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6874 transitions. [2021-06-12 20:00:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:18,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:18,617 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:18,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3750,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:18,821 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1000275048, now seen corresponding path program 437 times [2021-06-12 20:00:18,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:18,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037933392] [2021-06-12 20:00:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:19,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037933392] [2021-06-12 20:00:19,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037933392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679631971] [2021-06-12 20:00:19,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:19,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:00:19,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:19,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:19,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:19,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:19,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:19,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:19,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:19,289 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:19,289 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:19,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:19,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:19,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679631971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:19,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:19,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:19,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448556234] [2021-06-12 20:00:19,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:19,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:19,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:19,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:19,354 INFO L87 Difference]: Start difference. First operand 2308 states and 6874 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:20,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:20,544 INFO L93 Difference]: Finished difference Result 2589 states and 7396 transitions. [2021-06-12 20:00:20,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:00:20,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:20,547 INFO L225 Difference]: With dead ends: 2589 [2021-06-12 20:00:20,547 INFO L226 Difference]: Without dead ends: 2589 [2021-06-12 20:00:20,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1066.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:00:20,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-12 20:00:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2217. [2021-06-12 20:00:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2217 states, 2216 states have (on average 2.9657039711191335) internal successors, (6572), 2216 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 6572 transitions. [2021-06-12 20:00:20,572 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 6572 transitions. Word has length 19 [2021-06-12 20:00:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:20,572 INFO L482 AbstractCegarLoop]: Abstraction has 2217 states and 6572 transitions. [2021-06-12 20:00:20,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:20,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 6572 transitions. [2021-06-12 20:00:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:20,575 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:20,575 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:20,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3755,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:20,785 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:20,785 INFO L82 PathProgramCache]: Analyzing trace with hash -839628416, now seen corresponding path program 438 times [2021-06-12 20:00:20,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:20,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558095013] [2021-06-12 20:00:20,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:00:20,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:20,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558095013] [2021-06-12 20:00:20,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558095013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:20,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966302282] [2021-06-12 20:00:20,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:21,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:21,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:21,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:21,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:21,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:21,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:21,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:21,200 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:21,200 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:21,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:21,200 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:21,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966302282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:21,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:21,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:21,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215500129] [2021-06-12 20:00:21,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:21,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:21,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:21,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:21,277 INFO L87 Difference]: Start difference. First operand 2217 states and 6572 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:22,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:22,336 INFO L93 Difference]: Finished difference Result 2408 states and 6911 transitions. [2021-06-12 20:00:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:00:22,336 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:22,339 INFO L225 Difference]: With dead ends: 2408 [2021-06-12 20:00:22,339 INFO L226 Difference]: Without dead ends: 2404 [2021-06-12 20:00:22,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 984.5ms TimeCoverageRelationStatistics Valid=250, Invalid=2402, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 20:00:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-12 20:00:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2218. [2021-06-12 20:00:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.962110960757781) internal successors, (6567), 2217 states have internal predecessors, (6567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6567 transitions. [2021-06-12 20:00:22,365 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6567 transitions. Word has length 19 [2021-06-12 20:00:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:22,365 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6567 transitions. [2021-06-12 20:00:22,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6567 transitions. [2021-06-12 20:00:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:22,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:22,367 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:22,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3759 [2021-06-12 20:00:22,584 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash 358412698, now seen corresponding path program 439 times [2021-06-12 20:00:22,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:22,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656625949] [2021-06-12 20:00:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:22,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:22,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656625949] [2021-06-12 20:00:22,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656625949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:22,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423599182] [2021-06-12 20:00:22,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:22,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:22,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:22,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:22,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:22,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:22,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:22,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:22,922 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:22,922 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:22,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:22,923 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:23,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423599182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:23,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:23,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:23,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490038826] [2021-06-12 20:00:23,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:23,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:23,008 INFO L87 Difference]: Start difference. First operand 2218 states and 6567 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:23,802 INFO L93 Difference]: Finished difference Result 2492 states and 7096 transitions. [2021-06-12 20:00:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:00:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:23,815 INFO L225 Difference]: With dead ends: 2492 [2021-06-12 20:00:23,815 INFO L226 Difference]: Without dead ends: 2488 [2021-06-12 20:00:23,816 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 626.0ms TimeCoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:00:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2021-06-12 20:00:23,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2223. [2021-06-12 20:00:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.963996399639964) internal successors, (6586), 2222 states have internal predecessors, (6586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 6586 transitions. [2021-06-12 20:00:23,840 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 6586 transitions. Word has length 19 [2021-06-12 20:00:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:23,840 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 6586 transitions. [2021-06-12 20:00:23,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 6586 transitions. [2021-06-12 20:00:23,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:23,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:23,842 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:24,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3765,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:24,058 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:24,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:24,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1160028926, now seen corresponding path program 440 times [2021-06-12 20:00:24,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:24,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156237034] [2021-06-12 20:00:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:24,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:24,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156237034] [2021-06-12 20:00:24,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156237034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:24,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899548416] [2021-06-12 20:00:24,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:24,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:24,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:24,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:24,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:24,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:24,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:24,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:24,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:24,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:24,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:24,512 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:24,512 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:24,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:24,513 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:24,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899548416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:24,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:24,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:24,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637082748] [2021-06-12 20:00:24,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:24,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:24,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:24,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:24,590 INFO L87 Difference]: Start difference. First operand 2223 states and 6586 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:25,819 INFO L93 Difference]: Finished difference Result 2547 states and 7260 transitions. [2021-06-12 20:00:25,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:00:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:25,822 INFO L225 Difference]: With dead ends: 2547 [2021-06-12 20:00:25,822 INFO L226 Difference]: Without dead ends: 2541 [2021-06-12 20:00:25,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:00:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-06-12 20:00:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2244. [2021-06-12 20:00:25,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 2.965670976370932) internal successors, (6652), 2243 states have internal predecessors, (6652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 6652 transitions. [2021-06-12 20:00:25,849 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 6652 transitions. Word has length 19 [2021-06-12 20:00:25,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:25,849 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 6652 transitions. [2021-06-12 20:00:25,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 6652 transitions. [2021-06-12 20:00:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:25,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:25,852 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:26,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3769 [2021-06-12 20:00:26,068 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:26,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1416594664, now seen corresponding path program 441 times [2021-06-12 20:00:26,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:26,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607855775] [2021-06-12 20:00:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:26,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607855775] [2021-06-12 20:00:26,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607855775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308089967] [2021-06-12 20:00:26,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:26,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:00:26,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:26,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:26,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:26,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:26,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:26,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:26,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:26,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:26,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:26,399 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:26,399 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:26,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:26,400 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:26,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308089967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:26,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:26,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:26,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95204764] [2021-06-12 20:00:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:26,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:26,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:26,453 INFO L87 Difference]: Start difference. First operand 2244 states and 6652 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:27,087 INFO L93 Difference]: Finished difference Result 2539 states and 7222 transitions. [2021-06-12 20:00:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:00:27,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:27,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:27,090 INFO L225 Difference]: With dead ends: 2539 [2021-06-12 20:00:27,090 INFO L226 Difference]: Without dead ends: 2537 [2021-06-12 20:00:27,090 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 430.0ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:00:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2021-06-12 20:00:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 2220. [2021-06-12 20:00:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 2.953582694907616) internal successors, (6554), 2219 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 6554 transitions. [2021-06-12 20:00:27,116 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 6554 transitions. Word has length 19 [2021-06-12 20:00:27,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:27,116 INFO L482 AbstractCegarLoop]: Abstraction has 2220 states and 6554 transitions. [2021-06-12 20:00:27,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 6554 transitions. [2021-06-12 20:00:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:27,119 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:27,119 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:27,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3774,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:27,333 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:27,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1167759324, now seen corresponding path program 442 times [2021-06-12 20:00:27,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:27,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725043232] [2021-06-12 20:00:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:27,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725043232] [2021-06-12 20:00:27,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725043232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542848640] [2021-06-12 20:00:27,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:27,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:27,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:27,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:27,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:27,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:27,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:27,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:27,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,666 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:27,667 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:27,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:27,667 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:27,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542848640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:27,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:27,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:27,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281613806] [2021-06-12 20:00:27,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:27,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:27,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:27,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:27,691 INFO L87 Difference]: Start difference. First operand 2220 states and 6554 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:28,258 INFO L93 Difference]: Finished difference Result 2563 states and 7274 transitions. [2021-06-12 20:00:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:00:28,259 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:28,262 INFO L225 Difference]: With dead ends: 2563 [2021-06-12 20:00:28,262 INFO L226 Difference]: Without dead ends: 2563 [2021-06-12 20:00:28,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 426.5ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:00:28,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2563 states. [2021-06-12 20:00:28,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2563 to 2223. [2021-06-12 20:00:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 2.9531953195319534) internal successors, (6562), 2222 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 6562 transitions. [2021-06-12 20:00:28,289 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 6562 transitions. Word has length 19 [2021-06-12 20:00:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:28,289 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 6562 transitions. [2021-06-12 20:00:28,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 6562 transitions. [2021-06-12 20:00:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:28,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:28,291 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:28,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3778 [2021-06-12 20:00:28,493 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash 337406490, now seen corresponding path program 443 times [2021-06-12 20:00:28,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:28,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722237818] [2021-06-12 20:00:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:28,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722237818] [2021-06-12 20:00:28,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722237818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543875236] [2021-06-12 20:00:28,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:28,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:28,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:28,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:28,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:28,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:28,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:28,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:28,824 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:28,825 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:28,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:28,825 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:28,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543875236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:28,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:28,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:28,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573345428] [2021-06-12 20:00:28,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:28,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:28,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:28,879 INFO L87 Difference]: Start difference. First operand 2223 states and 6562 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:29,433 INFO L93 Difference]: Finished difference Result 2401 states and 6892 transitions. [2021-06-12 20:00:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:00:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:29,435 INFO L225 Difference]: With dead ends: 2401 [2021-06-12 20:00:29,435 INFO L226 Difference]: Without dead ends: 2399 [2021-06-12 20:00:29,436 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-06-12 20:00:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2211. [2021-06-12 20:00:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.951131221719457) internal successors, (6522), 2210 states have internal predecessors, (6522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 6522 transitions. [2021-06-12 20:00:29,460 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 6522 transitions. Word has length 19 [2021-06-12 20:00:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:29,460 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 6522 transitions. [2021-06-12 20:00:29,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 6522 transitions. [2021-06-12 20:00:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:29,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:29,463 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:29,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3781 [2021-06-12 20:00:29,673 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1944927676, now seen corresponding path program 444 times [2021-06-12 20:00:29,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:29,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278257995] [2021-06-12 20:00:29,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:29,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:29,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278257995] [2021-06-12 20:00:29,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278257995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:29,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790990509] [2021-06-12 20:00:29,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:29,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:00:29,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:30,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:30,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:30,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:30,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:30,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:30,153 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:30,154 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:30,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:30,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:30,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790990509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:30,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:30,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:30,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640616212] [2021-06-12 20:00:30,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:30,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:30,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:30,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:30,237 INFO L87 Difference]: Start difference. First operand 2211 states and 6522 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:31,058 INFO L93 Difference]: Finished difference Result 2380 states and 6825 transitions. [2021-06-12 20:00:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:00:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:31,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:31,062 INFO L225 Difference]: With dead ends: 2380 [2021-06-12 20:00:31,062 INFO L226 Difference]: Without dead ends: 2376 [2021-06-12 20:00:31,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1700, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:00:31,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-12 20:00:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2207. [2021-06-12 20:00:31,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.9505893019038987) internal successors, (6509), 2206 states have internal predecessors, (6509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6509 transitions. [2021-06-12 20:00:31,085 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6509 transitions. Word has length 19 [2021-06-12 20:00:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:31,085 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6509 transitions. [2021-06-12 20:00:31,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6509 transitions. [2021-06-12 20:00:31,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:31,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:31,087 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:31,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3785,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:31,304 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:31,304 INFO L82 PathProgramCache]: Analyzing trace with hash -620992286, now seen corresponding path program 445 times [2021-06-12 20:00:31,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:31,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977793088] [2021-06-12 20:00:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:31,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977793088] [2021-06-12 20:00:31,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977793088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978646472] [2021-06-12 20:00:31,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:31,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:31,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:00:31,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:31,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:31,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:31,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:00:31,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:31,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:31,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:31,797 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:00:31,797 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:31,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:31,798 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:00:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:31,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978646472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:31,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:31,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71908455] [2021-06-12 20:00:31,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:31,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:31,827 INFO L87 Difference]: Start difference. First operand 2207 states and 6509 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:32,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:32,673 INFO L93 Difference]: Finished difference Result 2338 states and 6745 transitions. [2021-06-12 20:00:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:00:32,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:32,676 INFO L225 Difference]: With dead ends: 2338 [2021-06-12 20:00:32,676 INFO L226 Difference]: Without dead ends: 2330 [2021-06-12 20:00:32,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 683.6ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:00:32,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-12 20:00:32,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 2205. [2021-06-12 20:00:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9478221415607986) internal successors, (6497), 2204 states have internal predecessors, (6497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:32,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6497 transitions. [2021-06-12 20:00:32,701 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6497 transitions. Word has length 19 [2021-06-12 20:00:32,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:32,701 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6497 transitions. [2021-06-12 20:00:32,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6497 transitions. [2021-06-12 20:00:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:32,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:32,703 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:32,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3791,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:32,913 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:32,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:32,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1146753116, now seen corresponding path program 446 times [2021-06-12 20:00:32,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:32,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897737179] [2021-06-12 20:00:32,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:33,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897737179] [2021-06-12 20:00:33,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897737179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:33,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061534059] [2021-06-12 20:00:33,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:33,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:33,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:33,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:33,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:33,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:33,253 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,279 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:33,280 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:33,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:33,280 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:33,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061534059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:33,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:33,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252345039] [2021-06-12 20:00:33,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:33,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:33,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:33,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:33,302 INFO L87 Difference]: Start difference. First operand 2205 states and 6497 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:34,103 INFO L93 Difference]: Finished difference Result 2482 states and 7063 transitions. [2021-06-12 20:00:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:00:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:34,106 INFO L225 Difference]: With dead ends: 2482 [2021-06-12 20:00:34,106 INFO L226 Difference]: Without dead ends: 2478 [2021-06-12 20:00:34,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 720.8ms TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:00:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2021-06-12 20:00:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2199. [2021-06-12 20:00:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9426751592356686) internal successors, (6468), 2198 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6468 transitions. [2021-06-12 20:00:34,130 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6468 transitions. Word has length 19 [2021-06-12 20:00:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:34,130 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 6468 transitions. [2021-06-12 20:00:34,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:34,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6468 transitions. [2021-06-12 20:00:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:34,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:34,132 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:34,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:34,349 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1439867516, now seen corresponding path program 447 times [2021-06-12 20:00:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:34,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689308989] [2021-06-12 20:00:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:34,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689308989] [2021-06-12 20:00:34,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689308989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885119915] [2021-06-12 20:00:34,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:34,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:34,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:34,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:00:34,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:34,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:34,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:00:34,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:00:34,687 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:34,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:34,690 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:34,720 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:00:34,720 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:34,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:00:34,721 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:00:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:34,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885119915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:34,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:34,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:34,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401461201] [2021-06-12 20:00:34,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:34,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:34,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:34,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:34,756 INFO L87 Difference]: Start difference. First operand 2199 states and 6468 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:35,534 INFO L93 Difference]: Finished difference Result 2299 states and 6645 transitions. [2021-06-12 20:00:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:00:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:35,538 INFO L225 Difference]: With dead ends: 2299 [2021-06-12 20:00:35,538 INFO L226 Difference]: Without dead ends: 2287 [2021-06-12 20:00:35,538 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 609.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:00:35,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-12 20:00:35,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2199. [2021-06-12 20:00:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.9381255686988172) internal successors, (6458), 2198 states have internal predecessors, (6458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 6458 transitions. [2021-06-12 20:00:35,561 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 6458 transitions. Word has length 19 [2021-06-12 20:00:35,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:35,561 INFO L482 AbstractCegarLoop]: Abstraction has 2199 states and 6458 transitions. [2021-06-12 20:00:35,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:35,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 6458 transitions. [2021-06-12 20:00:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:35,563 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:35,563 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:35,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3801 [2021-06-12 20:00:35,764 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash -342651880, now seen corresponding path program 448 times [2021-06-12 20:00:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:35,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735983935] [2021-06-12 20:00:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:35,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735983935] [2021-06-12 20:00:35,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735983935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:35,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361348478] [2021-06-12 20:00:35,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:35,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:35,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:36,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:36,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:36,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:36,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,127 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:36,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:36,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:36,128 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:36,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361348478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:36,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:36,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:36,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244318492] [2021-06-12 20:00:36,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:36,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:36,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:36,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:36,151 INFO L87 Difference]: Start difference. First operand 2199 states and 6458 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:36,581 INFO L93 Difference]: Finished difference Result 2465 states and 7055 transitions. [2021-06-12 20:00:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:36,596 INFO L225 Difference]: With dead ends: 2465 [2021-06-12 20:00:36,596 INFO L226 Difference]: Without dead ends: 2465 [2021-06-12 20:00:36,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:36,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-12 20:00:36,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 2205. [2021-06-12 20:00:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.939201451905626) internal successors, (6478), 2204 states have internal predecessors, (6478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:36,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6478 transitions. [2021-06-12 20:00:36,629 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6478 transitions. Word has length 19 [2021-06-12 20:00:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:36,629 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6478 transitions. [2021-06-12 20:00:36,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6478 transitions. [2021-06-12 20:00:36,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:36,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:36,631 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:36,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-06-12 20:00:36,832 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash -313785958, now seen corresponding path program 449 times [2021-06-12 20:00:36,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:36,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049465669] [2021-06-12 20:00:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:37,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049465669] [2021-06-12 20:00:37,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049465669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896965025] [2021-06-12 20:00:37,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:37,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:37,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:37,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:37,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:37,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:37,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:37,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:37,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:37,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:37,273 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:37,273 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:37,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:37,274 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:37,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896965025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:37,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:37,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:37,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410175607] [2021-06-12 20:00:37,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:37,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:37,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:37,330 INFO L87 Difference]: Start difference. First operand 2205 states and 6478 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:37,837 INFO L93 Difference]: Finished difference Result 2452 states and 7010 transitions. [2021-06-12 20:00:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:00:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:37,840 INFO L225 Difference]: With dead ends: 2452 [2021-06-12 20:00:37,840 INFO L226 Difference]: Without dead ends: 2451 [2021-06-12 20:00:37,840 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:00:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-12 20:00:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2222. [2021-06-12 20:00:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2222 states, 2221 states have (on average 2.9477712742008104) internal successors, (6547), 2221 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 6547 transitions. [2021-06-12 20:00:37,866 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 6547 transitions. Word has length 19 [2021-06-12 20:00:37,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:37,866 INFO L482 AbstractCegarLoop]: Abstraction has 2222 states and 6547 transitions. [2021-06-12 20:00:37,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 6547 transitions. [2021-06-12 20:00:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:37,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:37,868 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:38,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-06-12 20:00:38,081 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:38,081 INFO L82 PathProgramCache]: Analyzing trace with hash 487830270, now seen corresponding path program 450 times [2021-06-12 20:00:38,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:38,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753368157] [2021-06-12 20:00:38,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:38,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:38,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753368157] [2021-06-12 20:00:38,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753368157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631902705] [2021-06-12 20:00:38,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:38,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:38,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:38,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:38,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:38,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:38,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:38,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:38,422 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:38,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:38,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:38,457 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:38,458 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:38,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:38,458 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631902705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:38,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:38,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533728728] [2021-06-12 20:00:38,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:38,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:38,532 INFO L87 Difference]: Start difference. First operand 2222 states and 6547 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:39,541 INFO L93 Difference]: Finished difference Result 2473 states and 7056 transitions. [2021-06-12 20:00:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:00:39,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:39,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:39,544 INFO L225 Difference]: With dead ends: 2473 [2021-06-12 20:00:39,544 INFO L226 Difference]: Without dead ends: 2463 [2021-06-12 20:00:39,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 911.3ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:00:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-06-12 20:00:39,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2231. [2021-06-12 20:00:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.947085201793722) internal successors, (6572), 2230 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6572 transitions. [2021-06-12 20:00:39,570 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6572 transitions. Word has length 19 [2021-06-12 20:00:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:39,570 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6572 transitions. [2021-06-12 20:00:39,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6572 transitions. [2021-06-12 20:00:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:39,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:39,572 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:39,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-06-12 20:00:39,785 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:39,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:39,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2088793320, now seen corresponding path program 451 times [2021-06-12 20:00:39,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:39,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966403083] [2021-06-12 20:00:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:39,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:39,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966403083] [2021-06-12 20:00:39,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966403083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:39,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050416145] [2021-06-12 20:00:39,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:39,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:40,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:40,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:40,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:40,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:40,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:40,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:40,227 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:40,227 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:40,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:40,228 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:40,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050416145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:40,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:40,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:40,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422620571] [2021-06-12 20:00:40,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:40,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:40,287 INFO L87 Difference]: Start difference. First operand 2231 states and 6572 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:41,003 INFO L93 Difference]: Finished difference Result 2450 states and 7009 transitions. [2021-06-12 20:00:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:00:41,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:41,006 INFO L225 Difference]: With dead ends: 2450 [2021-06-12 20:00:41,006 INFO L226 Difference]: Without dead ends: 2450 [2021-06-12 20:00:41,006 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 626.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1040, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:00:41,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-06-12 20:00:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 2209. [2021-06-12 20:00:41,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.9384057971014492) internal successors, (6488), 2208 states have internal predecessors, (6488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6488 transitions. [2021-06-12 20:00:41,030 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6488 transitions. Word has length 19 [2021-06-12 20:00:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:41,030 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6488 transitions. [2021-06-12 20:00:41,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6488 transitions. [2021-06-12 20:00:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:41,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:41,033 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:41,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3820,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:41,246 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash 495560668, now seen corresponding path program 452 times [2021-06-12 20:00:41,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:41,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200707941] [2021-06-12 20:00:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200707941] [2021-06-12 20:00:41,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200707941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457539063] [2021-06-12 20:00:41,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:41,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:41,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:41,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:41,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:41,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:41,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,636 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:41,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:41,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:41,637 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:41,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457539063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:41,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:41,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:41,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913785804] [2021-06-12 20:00:41,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:41,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:41,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:41,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:41,662 INFO L87 Difference]: Start difference. First operand 2209 states and 6488 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:42,689 INFO L93 Difference]: Finished difference Result 2513 states and 7080 transitions. [2021-06-12 20:00:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:00:42,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:42,692 INFO L225 Difference]: With dead ends: 2513 [2021-06-12 20:00:42,692 INFO L226 Difference]: Without dead ends: 2507 [2021-06-12 20:00:42,692 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1605, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:00:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-12 20:00:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2188. [2021-06-12 20:00:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.9350708733424784) internal successors, (6419), 2187 states have internal predecessors, (6419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6419 transitions. [2021-06-12 20:00:42,716 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6419 transitions. Word has length 19 [2021-06-12 20:00:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:42,716 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6419 transitions. [2021-06-12 20:00:42,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6419 transitions. [2021-06-12 20:00:42,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:42,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:42,718 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:42,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3824 [2021-06-12 20:00:42,919 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:42,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash -993844328, now seen corresponding path program 453 times [2021-06-12 20:00:42,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:42,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182556156] [2021-06-12 20:00:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:43,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:43,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182556156] [2021-06-12 20:00:43,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182556156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:43,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613885789] [2021-06-12 20:00:43,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:43,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:00:43,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:43,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:43,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:43,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:43,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:43,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:43,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:43,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:43,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,336 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:43,337 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:43,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:43,337 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:43,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613885789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:43,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:43,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:43,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797807955] [2021-06-12 20:00:43,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:43,359 INFO L87 Difference]: Start difference. First operand 2188 states and 6419 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:44,703 INFO L93 Difference]: Finished difference Result 2513 states and 7095 transitions. [2021-06-12 20:00:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:00:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:44,706 INFO L225 Difference]: With dead ends: 2513 [2021-06-12 20:00:44,706 INFO L226 Difference]: Without dead ends: 2513 [2021-06-12 20:00:44,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1025.3ms TimeCoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:00:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2513 states. [2021-06-12 20:00:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2513 to 2207. [2021-06-12 20:00:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.9324569356301) internal successors, (6469), 2206 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6469 transitions. [2021-06-12 20:00:44,730 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6469 transitions. Word has length 19 [2021-06-12 20:00:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:44,731 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6469 transitions. [2021-06-12 20:00:44,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6469 transitions. [2021-06-12 20:00:44,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:44,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:44,733 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:44,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3827 [2021-06-12 20:00:44,937 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:44,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:44,938 INFO L82 PathProgramCache]: Analyzing trace with hash 79241052, now seen corresponding path program 454 times [2021-06-12 20:00:44,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:44,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803004758] [2021-06-12 20:00:44,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803004758] [2021-06-12 20:00:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803004758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832128748] [2021-06-12 20:00:45,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:45,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:45,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:45,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:45,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:45,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:45,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:45,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:45,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,266 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:45,266 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:45,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:45,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832128748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:45,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:00:45,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718173196] [2021-06-12 20:00:45,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:00:45,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:00:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:00:45,326 INFO L87 Difference]: Start difference. First operand 2207 states and 6469 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:45,610 INFO L93 Difference]: Finished difference Result 2348 states and 6752 transitions. [2021-06-12 20:00:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:00:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:45,612 INFO L225 Difference]: With dead ends: 2348 [2021-06-12 20:00:45,612 INFO L226 Difference]: Without dead ends: 2348 [2021-06-12 20:00:45,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-12 20:00:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2194. [2021-06-12 20:00:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.93296853625171) internal successors, (6432), 2193 states have internal predecessors, (6432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6432 transitions. [2021-06-12 20:00:45,636 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6432 transitions. Word has length 19 [2021-06-12 20:00:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:45,636 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6432 transitions. [2021-06-12 20:00:45,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:45,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6432 transitions. [2021-06-12 20:00:45,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:45,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:45,639 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:45,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:45,855 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash 974084634, now seen corresponding path program 455 times [2021-06-12 20:00:45,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:45,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923009232] [2021-06-12 20:00:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:45,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923009232] [2021-06-12 20:00:45,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923009232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:45,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307722801] [2021-06-12 20:00:45,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:46,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:00:46,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:46,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:46,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:46,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:46,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:46,195 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:46,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:46,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:46,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:46,234 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:46,235 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:46,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:46,235 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:46,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307722801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:46,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:46,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:46,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453342490] [2021-06-12 20:00:46,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:46,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:46,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:46,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:46,299 INFO L87 Difference]: Start difference. First operand 2194 states and 6432 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:46,700 INFO L93 Difference]: Finished difference Result 2389 states and 6806 transitions. [2021-06-12 20:00:46,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:00:46,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:46,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:46,703 INFO L225 Difference]: With dead ends: 2389 [2021-06-12 20:00:46,703 INFO L226 Difference]: Without dead ends: 2389 [2021-06-12 20:00:46,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:00:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-06-12 20:00:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2215. [2021-06-12 20:00:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 2.93676603432701) internal successors, (6502), 2214 states have internal predecessors, (6502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6502 transitions. [2021-06-12 20:00:46,729 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6502 transitions. Word has length 19 [2021-06-12 20:00:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:46,729 INFO L482 AbstractCegarLoop]: Abstraction has 2215 states and 6502 transitions. [2021-06-12 20:00:46,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6502 transitions. [2021-06-12 20:00:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:46,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:46,731 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:46,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3833,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:46,948 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1775700862, now seen corresponding path program 456 times [2021-06-12 20:00:46,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:46,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256350144] [2021-06-12 20:00:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:47,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:47,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256350144] [2021-06-12 20:00:47,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256350144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680608047] [2021-06-12 20:00:47,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:47,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:47,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:47,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:47,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:47,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:47,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:47,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:47,327 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:47,359 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:47,359 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:47,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:47,359 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:47,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680608047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:47,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:47,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:47,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429020616] [2021-06-12 20:00:47,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:47,470 INFO L87 Difference]: Start difference. First operand 2215 states and 6502 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:48,692 INFO L93 Difference]: Finished difference Result 2423 states and 6873 transitions. [2021-06-12 20:00:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:00:48,693 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:48,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:48,696 INFO L225 Difference]: With dead ends: 2423 [2021-06-12 20:00:48,696 INFO L226 Difference]: Without dead ends: 2411 [2021-06-12 20:00:48,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1090.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:00:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-12 20:00:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2221. [2021-06-12 20:00:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2221 states, 2220 states have (on average 2.9364864864864866) internal successors, (6519), 2220 states have internal predecessors, (6519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6519 transitions. [2021-06-12 20:00:48,721 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6519 transitions. Word has length 19 [2021-06-12 20:00:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:48,721 INFO L482 AbstractCegarLoop]: Abstraction has 2221 states and 6519 transitions. [2021-06-12 20:00:48,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6519 transitions. [2021-06-12 20:00:48,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:48,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:48,723 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:48,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3837 [2021-06-12 20:00:48,923 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash -800922728, now seen corresponding path program 457 times [2021-06-12 20:00:48,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:48,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764600987] [2021-06-12 20:00:48,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:49,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:49,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764600987] [2021-06-12 20:00:49,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764600987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:49,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259273135] [2021-06-12 20:00:49,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:49,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:49,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:00:49,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:49,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:49,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:49,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:49,274 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:49,307 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:00:49,307 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:49,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:00:49,308 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:00:49,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:49,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259273135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:49,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:49,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:49,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191443290] [2021-06-12 20:00:49,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:49,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:49,369 INFO L87 Difference]: Start difference. First operand 2221 states and 6519 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:50,131 INFO L93 Difference]: Finished difference Result 2391 states and 6825 transitions. [2021-06-12 20:00:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:00:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:50,134 INFO L225 Difference]: With dead ends: 2391 [2021-06-12 20:00:50,134 INFO L226 Difference]: Without dead ends: 2391 [2021-06-12 20:00:50,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 717.0ms TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:00:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-12 20:00:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2207. [2021-06-12 20:00:50,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 2.931097008159565) internal successors, (6466), 2206 states have internal predecessors, (6466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6466 transitions. [2021-06-12 20:00:50,158 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6466 transitions. Word has length 19 [2021-06-12 20:00:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:50,158 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 6466 transitions. [2021-06-12 20:00:50,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6466 transitions. [2021-06-12 20:00:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:50,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:50,160 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:50,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3842 [2021-06-12 20:00:50,376 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:50,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:50,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1783431260, now seen corresponding path program 458 times [2021-06-12 20:00:50,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:50,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395301285] [2021-06-12 20:00:50,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:50,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395301285] [2021-06-12 20:00:50,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395301285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913351327] [2021-06-12 20:00:50,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:50,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:00:50,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:50,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:50,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:50,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:50,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:50,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,891 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:50,891 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:50,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:50,892 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:50,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913351327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:50,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:50,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:50,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768075932] [2021-06-12 20:00:50,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:50,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:50,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:50,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:50,917 INFO L87 Difference]: Start difference. First operand 2207 states and 6466 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:52,059 INFO L93 Difference]: Finished difference Result 2494 states and 7014 transitions. [2021-06-12 20:00:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:00:52,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:52,061 INFO L225 Difference]: With dead ends: 2494 [2021-06-12 20:00:52,061 INFO L226 Difference]: Without dead ends: 2494 [2021-06-12 20:00:52,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:00:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2021-06-12 20:00:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2205. [2021-06-12 20:00:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.9310344827586206) internal successors, (6460), 2204 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6460 transitions. [2021-06-12 20:00:52,085 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6460 transitions. Word has length 19 [2021-06-12 20:00:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:52,085 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6460 transitions. [2021-06-12 20:00:52,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6460 transitions. [2021-06-12 20:00:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:52,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:52,087 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:52,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3846,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:52,304 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:52,304 INFO L82 PathProgramCache]: Analyzing trace with hash 294026264, now seen corresponding path program 459 times [2021-06-12 20:00:52,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:52,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668323476] [2021-06-12 20:00:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:52,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:52,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668323476] [2021-06-12 20:00:52,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668323476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851718016] [2021-06-12 20:00:52,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:52,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:00:52,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:52,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:52,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:52,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,686 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:52,686 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:52,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:52,687 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:52,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851718016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:52,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:52,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:52,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409955010] [2021-06-12 20:00:52,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:52,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:52,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:52,712 INFO L87 Difference]: Start difference. First operand 2205 states and 6460 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:54,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:54,417 INFO L93 Difference]: Finished difference Result 2625 states and 7276 transitions. [2021-06-12 20:00:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:00:54,418 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:54,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:54,421 INFO L225 Difference]: With dead ends: 2625 [2021-06-12 20:00:54,421 INFO L226 Difference]: Without dead ends: 2625 [2021-06-12 20:00:54,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1386.6ms TimeCoverageRelationStatistics Valid=427, Invalid=3605, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:00:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-06-12 20:00:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2206. [2021-06-12 20:00:54,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.931065759637188) internal successors, (6463), 2205 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6463 transitions. [2021-06-12 20:00:54,449 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6463 transitions. Word has length 19 [2021-06-12 20:00:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:54,449 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6463 transitions. [2021-06-12 20:00:54,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6463 transitions. [2021-06-12 20:00:54,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:54,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:54,452 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:54,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3849 [2021-06-12 20:00:54,669 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1367111644, now seen corresponding path program 460 times [2021-06-12 20:00:54,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:54,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087821432] [2021-06-12 20:00:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:54,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:54,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087821432] [2021-06-12 20:00:54,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087821432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:54,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854950291] [2021-06-12 20:00:54,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:54,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:00:54,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:54,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:55,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:55,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:55,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:55,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,063 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:55,063 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:55,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:55,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:55,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854950291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:55,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:55,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:55,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330285608] [2021-06-12 20:00:55,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:55,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:55,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:55,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:55,091 INFO L87 Difference]: Start difference. First operand 2206 states and 6463 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:58,000 INFO L93 Difference]: Finished difference Result 2591 states and 7250 transitions. [2021-06-12 20:00:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-12 20:00:58,001 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:58,004 INFO L225 Difference]: With dead ends: 2591 [2021-06-12 20:00:58,004 INFO L226 Difference]: Without dead ends: 2591 [2021-06-12 20:00:58,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2258 ImplicationChecksByTransitivity, 2336.6ms TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 20:00:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2021-06-12 20:00:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2208. [2021-06-12 20:00:58,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.931128228364295) internal successors, (6469), 2207 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6469 transitions. [2021-06-12 20:00:58,031 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6469 transitions. Word has length 19 [2021-06-12 20:00:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:58,031 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6469 transitions. [2021-06-12 20:00:58,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:58,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6469 transitions. [2021-06-12 20:00:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:58,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:58,033 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:58,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3852,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:58,245 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash 273020056, now seen corresponding path program 461 times [2021-06-12 20:00:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:58,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593068525] [2021-06-12 20:00:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:58,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:58,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593068525] [2021-06-12 20:00:58,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593068525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:58,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645860152] [2021-06-12 20:00:58,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:58,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:00:58,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:58,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:58,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:58,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:58,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:58,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:58,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:58,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:58,631 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,658 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:00:58,658 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:58,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:58,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:00:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:58,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645860152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:58,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:58,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:00:58,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750472679] [2021-06-12 20:00:58,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:00:58,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:58,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:00:58,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:58,687 INFO L87 Difference]: Start difference. First operand 2208 states and 6469 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:00:59,020 INFO L93 Difference]: Finished difference Result 2306 states and 6668 transitions. [2021-06-12 20:00:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:00:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:00:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:00:59,023 INFO L225 Difference]: With dead ends: 2306 [2021-06-12 20:00:59,023 INFO L226 Difference]: Without dead ends: 2306 [2021-06-12 20:00:59,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:00:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2021-06-12 20:00:59,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2208. [2021-06-12 20:00:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.931128228364295) internal successors, (6469), 2207 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6469 transitions. [2021-06-12 20:00:59,047 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6469 transitions. Word has length 19 [2021-06-12 20:00:59,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:00:59,047 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6469 transitions. [2021-06-12 20:00:59,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:00:59,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6469 transitions. [2021-06-12 20:00:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:00:59,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:00:59,050 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:00:59,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3855,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:59,250 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:00:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:00:59,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1211565410, now seen corresponding path program 462 times [2021-06-12 20:00:59,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:00:59,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418343134] [2021-06-12 20:00:59,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:00:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:00:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:59,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:00:59,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418343134] [2021-06-12 20:00:59,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418343134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965830355] [2021-06-12 20:00:59,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:00:59,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:00:59,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:00:59,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:00:59,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:00:59,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:00:59,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:00:59,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:00:59,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,603 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:00:59,603 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:00:59,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:00:59,603 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:00:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:00:59,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965830355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:00:59,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:00:59,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:00:59,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370138699] [2021-06-12 20:00:59,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:00:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:00:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:00:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:00:59,633 INFO L87 Difference]: Start difference. First operand 2208 states and 6469 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:00,080 INFO L93 Difference]: Finished difference Result 2441 states and 6959 transitions. [2021-06-12 20:01:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:01:00,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:00,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:00,084 INFO L225 Difference]: With dead ends: 2441 [2021-06-12 20:01:00,084 INFO L226 Difference]: Without dead ends: 2441 [2021-06-12 20:01:00,084 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:01:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-12 20:01:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2268. [2021-06-12 20:01:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 2.941773268636965) internal successors, (6669), 2267 states have internal predecessors, (6669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 6669 transitions. [2021-06-12 20:01:00,110 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 6669 transitions. Word has length 19 [2021-06-12 20:01:00,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:00,110 INFO L482 AbstractCegarLoop]: Abstraction has 2268 states and 6669 transitions. [2021-06-12 20:01:00,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 6669 transitions. [2021-06-12 20:01:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:00,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:00,112 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:00,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3858,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:00,321 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash -280682822, now seen corresponding path program 463 times [2021-06-12 20:01:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:00,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210407823] [2021-06-12 20:01:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:00,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:00,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210407823] [2021-06-12 20:01:00,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210407823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:00,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674905151] [2021-06-12 20:01:00,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:00,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:00,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:00,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:00,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:00,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:00,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:00,699 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:00,702 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:00,705 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:00,733 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:01:00,733 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:00,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:00,734 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:01:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:00,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674905151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:00,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:00,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20495037] [2021-06-12 20:01:00,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:00,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:00,776 INFO L87 Difference]: Start difference. First operand 2268 states and 6669 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:01,639 INFO L93 Difference]: Finished difference Result 2383 states and 6831 transitions. [2021-06-12 20:01:01,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:01:01,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:01,643 INFO L225 Difference]: With dead ends: 2383 [2021-06-12 20:01:01,643 INFO L226 Difference]: Without dead ends: 2375 [2021-06-12 20:01:01,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:01:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2021-06-12 20:01:01,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2275. [2021-06-12 20:01:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.936675461741425) internal successors, (6678), 2274 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6678 transitions. [2021-06-12 20:01:01,674 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6678 transitions. Word has length 19 [2021-06-12 20:01:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:01,674 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6678 transitions. [2021-06-12 20:01:01,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6678 transitions. [2021-06-12 20:01:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:01,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:01,677 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:01,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3860,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:01,905 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:01,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1922379772, now seen corresponding path program 464 times [2021-06-12 20:01:01,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:01,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105571372] [2021-06-12 20:01:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:02,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:02,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105571372] [2021-06-12 20:01:02,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105571372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105424754] [2021-06-12 20:01:02,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:02,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:02,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:02,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:02,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:02,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:02,295 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,316 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:01:02,316 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:02,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:02,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:01:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:02,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105424754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:02,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:02,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880447835] [2021-06-12 20:01:02,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:02,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:02,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:02,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:02,346 INFO L87 Difference]: Start difference. First operand 2275 states and 6678 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:04,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:04,081 INFO L93 Difference]: Finished difference Result 2619 states and 7342 transitions. [2021-06-12 20:01:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 20:01:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:04,084 INFO L225 Difference]: With dead ends: 2619 [2021-06-12 20:01:04,084 INFO L226 Difference]: Without dead ends: 2616 [2021-06-12 20:01:04,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1449.3ms TimeCoverageRelationStatistics Valid=364, Invalid=3296, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:01:04,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-12 20:01:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2292. [2021-06-12 20:01:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2292 states, 2291 states have (on average 2.939764295067656) internal successors, (6735), 2291 states have internal predecessors, (6735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2292 states to 2292 states and 6735 transitions. [2021-06-12 20:01:04,114 INFO L78 Accepts]: Start accepts. Automaton has 2292 states and 6735 transitions. Word has length 19 [2021-06-12 20:01:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:04,114 INFO L482 AbstractCegarLoop]: Abstraction has 2292 states and 6735 transitions. [2021-06-12 20:01:04,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2292 states and 6735 transitions. [2021-06-12 20:01:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:04,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:04,116 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:04,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3865,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:04,329 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:04,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:04,329 INFO L82 PathProgramCache]: Analyzing trace with hash -818538400, now seen corresponding path program 465 times [2021-06-12 20:01:04,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:04,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956699026] [2021-06-12 20:01:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:04,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956699026] [2021-06-12 20:01:04,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956699026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733677595] [2021-06-12 20:01:04,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:04,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:04,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:04,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:04,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:04,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:04,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:04,695 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:04,698 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:04,700 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:04,727 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:01:04,727 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:04,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:04,728 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:01:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:04,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733677595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:04,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:04,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:04,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129007467] [2021-06-12 20:01:04,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:04,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:04,797 INFO L87 Difference]: Start difference. First operand 2292 states and 6735 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:05,803 INFO L93 Difference]: Finished difference Result 2421 states and 6932 transitions. [2021-06-12 20:01:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:01:05,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:05,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:05,807 INFO L225 Difference]: With dead ends: 2421 [2021-06-12 20:01:05,807 INFO L226 Difference]: Without dead ends: 2415 [2021-06-12 20:01:05,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 878.0ms TimeCoverageRelationStatistics Valid=206, Invalid=1956, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:01:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-12 20:01:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2298. [2021-06-12 20:01:05,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.936003482803657) internal successors, (6744), 2297 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 6744 transitions. [2021-06-12 20:01:05,832 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 6744 transitions. Word has length 19 [2021-06-12 20:01:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:05,832 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 6744 transitions. [2021-06-12 20:01:05,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 6744 transitions. [2021-06-12 20:01:05,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:05,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:05,834 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:06,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3867,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:06,035 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:06,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2132945186, now seen corresponding path program 466 times [2021-06-12 20:01:06,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:06,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816105551] [2021-06-12 20:01:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:06,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:06,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816105551] [2021-06-12 20:01:06,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816105551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623381223] [2021-06-12 20:01:06,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:06,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:06,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:06,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:06,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:06,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,399 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:01:06,399 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:06,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:06,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:01:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:06,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623381223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:06,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:06,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:06,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104100933] [2021-06-12 20:01:06,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:06,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:06,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:06,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:06,428 INFO L87 Difference]: Start difference. First operand 2298 states and 6744 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:07,833 INFO L93 Difference]: Finished difference Result 2660 states and 7469 transitions. [2021-06-12 20:01:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:01:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:07,836 INFO L225 Difference]: With dead ends: 2660 [2021-06-12 20:01:07,836 INFO L226 Difference]: Without dead ends: 2657 [2021-06-12 20:01:07,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1168.1ms TimeCoverageRelationStatistics Valid=305, Invalid=2775, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:01:07,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-06-12 20:01:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2336. [2021-06-12 20:01:07,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 2335 states have (on average 2.9413276231263383) internal successors, (6868), 2335 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 6868 transitions. [2021-06-12 20:01:07,865 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 6868 transitions. Word has length 19 [2021-06-12 20:01:07,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:07,865 INFO L482 AbstractCegarLoop]: Abstraction has 2336 states and 6868 transitions. [2021-06-12 20:01:07,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 6868 transitions. [2021-06-12 20:01:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:07,868 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:07,868 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:08,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3872,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:08,085 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:08,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1242321402, now seen corresponding path program 467 times [2021-06-12 20:01:08,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:08,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359485685] [2021-06-12 20:01:08,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:08,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:08,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359485685] [2021-06-12 20:01:08,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359485685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885324921] [2021-06-12 20:01:08,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:08,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:08,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:08,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:08,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:08,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:08,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:08,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:08,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:08,453 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:08,455 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:08,482 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:01:08,482 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:08,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:08,483 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:01:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:08,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885324921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:08,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:08,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:08,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381272578] [2021-06-12 20:01:08,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:08,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:08,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:08,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:08,520 INFO L87 Difference]: Start difference. First operand 2336 states and 6868 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:09,546 INFO L93 Difference]: Finished difference Result 2433 states and 7025 transitions. [2021-06-12 20:01:09,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:01:09,546 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:09,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:09,549 INFO L225 Difference]: With dead ends: 2433 [2021-06-12 20:01:09,549 INFO L226 Difference]: Without dead ends: 2429 [2021-06-12 20:01:09,549 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 860.2ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:01:09,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-12 20:01:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2339. [2021-06-12 20:01:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 2.9345594525235246) internal successors, (6861), 2338 states have internal predecessors, (6861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 6861 transitions. [2021-06-12 20:01:09,574 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 6861 transitions. Word has length 19 [2021-06-12 20:01:09,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:09,574 INFO L482 AbstractCegarLoop]: Abstraction has 2339 states and 6861 transitions. [2021-06-12 20:01:09,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:09,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 6861 transitions. [2021-06-12 20:01:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:09,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:09,576 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:09,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3874,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:09,785 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2125214788, now seen corresponding path program 468 times [2021-06-12 20:01:09,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:09,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861722691] [2021-06-12 20:01:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:09,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:09,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861722691] [2021-06-12 20:01:09,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861722691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:09,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037942037] [2021-06-12 20:01:09,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:09,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:01:09,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:09,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:10,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:10,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:10,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:10,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:10,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:10,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:10,178 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:10,178 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:10,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:10,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:10,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037942037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:10,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:10,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:10,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83715915] [2021-06-12 20:01:10,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:10,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:10,240 INFO L87 Difference]: Start difference. First operand 2339 states and 6861 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:11,433 INFO L93 Difference]: Finished difference Result 2643 states and 7373 transitions. [2021-06-12 20:01:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:01:11,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:11,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:11,436 INFO L225 Difference]: With dead ends: 2643 [2021-06-12 20:01:11,436 INFO L226 Difference]: Without dead ends: 2641 [2021-06-12 20:01:11,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 943.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:01:11,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-12 20:01:11,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2285. [2021-06-12 20:01:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2284 states have (on average 2.9229422066549913) internal successors, (6676), 2284 states have internal predecessors, (6676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:11,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 6676 transitions. [2021-06-12 20:01:11,463 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 6676 transitions. Word has length 19 [2021-06-12 20:01:11,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:11,463 INFO L482 AbstractCegarLoop]: Abstraction has 2285 states and 6676 transitions. [2021-06-12 20:01:11,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:11,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 6676 transitions. [2021-06-12 20:01:11,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:11,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:11,465 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:11,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3879,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:11,666 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1323598560, now seen corresponding path program 469 times [2021-06-12 20:01:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:11,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808493921] [2021-06-12 20:01:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:11,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808493921] [2021-06-12 20:01:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808493921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843748156] [2021-06-12 20:01:11,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:11,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:11,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:11,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:11,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:11,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:11,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:12,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:12,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:12,005 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:12,038 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:12,038 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:12,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:12,038 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:12,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843748156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:12,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:12,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:12,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922513943] [2021-06-12 20:01:12,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:12,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:12,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:12,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:12,122 INFO L87 Difference]: Start difference. First operand 2285 states and 6676 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:13,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:13,324 INFO L93 Difference]: Finished difference Result 2491 states and 7057 transitions. [2021-06-12 20:01:13,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 20:01:13,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:13,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:13,327 INFO L225 Difference]: With dead ends: 2491 [2021-06-12 20:01:13,327 INFO L226 Difference]: Without dead ends: 2487 [2021-06-12 20:01:13,327 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1077.7ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:01:13,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-12 20:01:13,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2293. [2021-06-12 20:01:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2292 states have (on average 2.9210296684118675) internal successors, (6695), 2292 states have internal predecessors, (6695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:13,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 6695 transitions. [2021-06-12 20:01:13,354 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 6695 transitions. Word has length 19 [2021-06-12 20:01:13,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:13,354 INFO L482 AbstractCegarLoop]: Abstraction has 2293 states and 6695 transitions. [2021-06-12 20:01:13,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 6695 transitions. [2021-06-12 20:01:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:13,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:13,356 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:13,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3883,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:13,573 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:13,573 INFO L82 PathProgramCache]: Analyzing trace with hash 394745146, now seen corresponding path program 470 times [2021-06-12 20:01:13,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:13,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035886541] [2021-06-12 20:01:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:13,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:13,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035886541] [2021-06-12 20:01:13,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035886541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:13,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994423642] [2021-06-12 20:01:13,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:13,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:13,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:13,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:13,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:13,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:13,952 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:13,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:13,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:13,988 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:13,988 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:13,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:13,989 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:14,049 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:14,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994423642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:14,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:14,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:14,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307454534] [2021-06-12 20:01:14,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:14,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:14,050 INFO L87 Difference]: Start difference. First operand 2293 states and 6695 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:14,826 INFO L93 Difference]: Finished difference Result 2462 states and 7000 transitions. [2021-06-12 20:01:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:01:14,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:14,829 INFO L225 Difference]: With dead ends: 2462 [2021-06-12 20:01:14,830 INFO L226 Difference]: Without dead ends: 2462 [2021-06-12 20:01:14,830 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 753.1ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:01:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-12 20:01:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2226. [2021-06-12 20:01:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.9087640449438203) internal successors, (6472), 2225 states have internal predecessors, (6472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 6472 transitions. [2021-06-12 20:01:14,857 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 6472 transitions. Word has length 19 [2021-06-12 20:01:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:14,857 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 6472 transitions. [2021-06-12 20:01:14,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 6472 transitions. [2021-06-12 20:01:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:14,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:14,859 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:15,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3888,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:15,073 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:15,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1611785190, now seen corresponding path program 471 times [2021-06-12 20:01:15,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:15,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367059657] [2021-06-12 20:01:15,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:01:15,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:15,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367059657] [2021-06-12 20:01:15,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367059657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254304063] [2021-06-12 20:01:15,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:15,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:15,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:15,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:15,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:15,415 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:15,418 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:15,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:15,421 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:15,453 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:15,453 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:15,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:15,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:15,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254304063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:15,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:15,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:15,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289789666] [2021-06-12 20:01:15,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:15,525 INFO L87 Difference]: Start difference. First operand 2226 states and 6472 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:16,690 INFO L93 Difference]: Finished difference Result 2355 states and 6707 transitions. [2021-06-12 20:01:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:01:16,690 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:16,693 INFO L225 Difference]: With dead ends: 2355 [2021-06-12 20:01:16,693 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 20:01:16,693 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 967.3ms TimeCoverageRelationStatistics Valid=248, Invalid=2202, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:01:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 20:01:16,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2231. [2021-06-12 20:01:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 2.907174887892377) internal successors, (6483), 2230 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 6483 transitions. [2021-06-12 20:01:16,716 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 6483 transitions. Word has length 19 [2021-06-12 20:01:16,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:16,716 INFO L482 AbstractCegarLoop]: Abstraction has 2231 states and 6483 transitions. [2021-06-12 20:01:16,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:16,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 6483 transitions. [2021-06-12 20:01:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:16,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:16,718 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:16,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-06-12 20:01:16,918 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:16,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:16,919 INFO L82 PathProgramCache]: Analyzing trace with hash 659341304, now seen corresponding path program 472 times [2021-06-12 20:01:16,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:16,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728077250] [2021-06-12 20:01:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:17,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728077250] [2021-06-12 20:01:17,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728077250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997062435] [2021-06-12 20:01:17,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:17,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:17,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:17,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:17,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:17,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:17,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:17,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:17,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:17,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:17,215 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:17,285 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:17,286 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:17,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:17,286 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997062435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:17,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:17,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:17,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468613716] [2021-06-12 20:01:17,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:17,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:17,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:17,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:17,349 INFO L87 Difference]: Start difference. First operand 2231 states and 6483 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:18,100 INFO L93 Difference]: Finished difference Result 2378 states and 6711 transitions. [2021-06-12 20:01:18,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:01:18,101 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:18,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:18,104 INFO L225 Difference]: With dead ends: 2378 [2021-06-12 20:01:18,104 INFO L226 Difference]: Without dead ends: 2377 [2021-06-12 20:01:18,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 597.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:01:18,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2021-06-12 20:01:18,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 2202. [2021-06-12 20:01:18,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 2.9000454338936845) internal successors, (6383), 2201 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 6383 transitions. [2021-06-12 20:01:18,130 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 6383 transitions. Word has length 19 [2021-06-12 20:01:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:18,130 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 6383 transitions. [2021-06-12 20:01:18,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:18,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 6383 transitions. [2021-06-12 20:01:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:18,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:18,132 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:18,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3898,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:18,345 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:18,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:18,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1460957532, now seen corresponding path program 473 times [2021-06-12 20:01:18,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:18,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608478306] [2021-06-12 20:01:18,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:18,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:18,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608478306] [2021-06-12 20:01:18,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608478306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:18,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997405374] [2021-06-12 20:01:18,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:18,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:01:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:18,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:18,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:18,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:18,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:18,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:18,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:18,856 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:18,856 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:18,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:18,857 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:18,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997405374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:18,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:18,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:18,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663861010] [2021-06-12 20:01:18,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:18,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:18,932 INFO L87 Difference]: Start difference. First operand 2202 states and 6383 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:19,600 INFO L93 Difference]: Finished difference Result 2334 states and 6632 transitions. [2021-06-12 20:01:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:01:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:19,603 INFO L225 Difference]: With dead ends: 2334 [2021-06-12 20:01:19,603 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 20:01:19,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 777.7ms TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:01:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 20:01:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2212. [2021-06-12 20:01:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 2211 states have (on average 2.895974672094075) internal successors, (6403), 2211 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 6403 transitions. [2021-06-12 20:01:19,628 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 6403 transitions. Word has length 19 [2021-06-12 20:01:19,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:19,628 INFO L482 AbstractCegarLoop]: Abstraction has 2212 states and 6403 transitions. [2021-06-12 20:01:19,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 6403 transitions. [2021-06-12 20:01:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:19,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:19,630 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:19,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3902 [2021-06-12 20:01:19,831 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1115666058, now seen corresponding path program 474 times [2021-06-12 20:01:19,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:19,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921635153] [2021-06-12 20:01:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:19,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921635153] [2021-06-12 20:01:19,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921635153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:19,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624664286] [2021-06-12 20:01:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:19,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:01:19,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:19,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:20,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:20,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:20,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:20,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:20,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:20,117 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:20,152 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:20,152 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:20,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:20,153 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624664286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:20,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:20,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:20,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287881632] [2021-06-12 20:01:20,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:20,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:20,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:20,211 INFO L87 Difference]: Start difference. First operand 2212 states and 6403 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:20,767 INFO L93 Difference]: Finished difference Result 2328 states and 6621 transitions. [2021-06-12 20:01:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:01:20,767 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:20,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:20,770 INFO L225 Difference]: With dead ends: 2328 [2021-06-12 20:01:20,770 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 20:01:20,770 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 480.9ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:01:20,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 20:01:20,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2205. [2021-06-12 20:01:20,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.8924682395644283) internal successors, (6375), 2204 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6375 transitions. [2021-06-12 20:01:20,795 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6375 transitions. Word has length 19 [2021-06-12 20:01:20,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:20,795 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6375 transitions. [2021-06-12 20:01:20,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6375 transitions. [2021-06-12 20:01:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:20,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:20,797 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:21,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3907 [2021-06-12 20:01:21,005 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:21,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:21,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1468687930, now seen corresponding path program 475 times [2021-06-12 20:01:21,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:21,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537125734] [2021-06-12 20:01:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:21,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:21,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537125734] [2021-06-12 20:01:21,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537125734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846339393] [2021-06-12 20:01:21,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:21,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:21,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:21,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:21,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:21,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,321 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:21,321 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:21,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:21,322 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:21,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846339393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:21,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:21,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955435440] [2021-06-12 20:01:21,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:21,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:21,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:21,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:21,346 INFO L87 Difference]: Start difference. First operand 2205 states and 6375 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:21,645 INFO L93 Difference]: Finished difference Result 2355 states and 6704 transitions. [2021-06-12 20:01:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:01:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:21,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:21,648 INFO L225 Difference]: With dead ends: 2355 [2021-06-12 20:01:21,648 INFO L226 Difference]: Without dead ends: 2355 [2021-06-12 20:01:21,649 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 267.3ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:01:21,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2355 states. [2021-06-12 20:01:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2355 to 2183. [2021-06-12 20:01:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 2.8900091659028413) internal successors, (6306), 2182 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 6306 transitions. [2021-06-12 20:01:21,673 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 6306 transitions. Word has length 19 [2021-06-12 20:01:21,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:21,673 INFO L482 AbstractCegarLoop]: Abstraction has 2183 states and 6306 transitions. [2021-06-12 20:01:21,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 6306 transitions. [2021-06-12 20:01:21,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:21,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:21,675 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:21,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-12 20:01:21,885 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:21,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:21,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1615670042, now seen corresponding path program 476 times [2021-06-12 20:01:21,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:21,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177321140] [2021-06-12 20:01:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:01:21,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177321140] [2021-06-12 20:01:21,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177321140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:21,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202916408] [2021-06-12 20:01:21,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:22,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:22,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:22,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:22,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:22,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:22,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:22,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:22,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:22,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:22,231 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:22,231 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:22,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:22,232 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:22,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202916408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:22,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:22,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 20:01:22,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122396999] [2021-06-12 20:01:22,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:01:22,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:01:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:22,307 INFO L87 Difference]: Start difference. First operand 2183 states and 6306 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:22,914 INFO L93 Difference]: Finished difference Result 2246 states and 6416 transitions. [2021-06-12 20:01:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:01:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:22,917 INFO L225 Difference]: With dead ends: 2246 [2021-06-12 20:01:22,917 INFO L226 Difference]: Without dead ends: 2242 [2021-06-12 20:01:22,917 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:01:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-12 20:01:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2181. [2021-06-12 20:01:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 2.889908256880734) internal successors, (6300), 2180 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 6300 transitions. [2021-06-12 20:01:22,941 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 6300 transitions. Word has length 19 [2021-06-12 20:01:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:22,941 INFO L482 AbstractCegarLoop]: Abstraction has 2181 states and 6300 transitions. [2021-06-12 20:01:22,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 6300 transitions. [2021-06-12 20:01:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:22,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:22,943 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:23,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:23,160 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:23,160 INFO L82 PathProgramCache]: Analyzing trace with hash -950249920, now seen corresponding path program 477 times [2021-06-12 20:01:23,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:23,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727846647] [2021-06-12 20:01:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:01:23,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:23,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727846647] [2021-06-12 20:01:23,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727846647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:23,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146060938] [2021-06-12 20:01:23,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:23,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:23,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:23,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:23,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:23,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:23,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:23,461 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:23,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:23,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:23,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:23,497 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:01:23,497 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:23,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:23,498 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:01:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:23,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146060938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:23,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:23,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 20:01:23,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966529451] [2021-06-12 20:01:23,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:01:23,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:23,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:01:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:01:23,525 INFO L87 Difference]: Start difference. First operand 2181 states and 6300 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:23,947 INFO L93 Difference]: Finished difference Result 2210 states and 6353 transitions. [2021-06-12 20:01:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:01:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:23,950 INFO L225 Difference]: With dead ends: 2210 [2021-06-12 20:01:23,950 INFO L226 Difference]: Without dead ends: 2202 [2021-06-12 20:01:23,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:01:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-12 20:01:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2179. [2021-06-12 20:01:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.8898071625344355) internal successors, (6294), 2178 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 6294 transitions. [2021-06-12 20:01:23,976 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 6294 transitions. Word has length 19 [2021-06-12 20:01:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:23,976 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 6294 transitions. [2021-06-12 20:01:23,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 6294 transitions. [2021-06-12 20:01:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:23,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:23,979 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:24,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3920,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:24,195 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:24,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1081234236, now seen corresponding path program 478 times [2021-06-12 20:01:24,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:24,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575923582] [2021-06-12 20:01:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575923582] [2021-06-12 20:01:24,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575923582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911577036] [2021-06-12 20:01:24,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:24,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:24,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:24,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:24,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:24,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:24,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:24,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:24,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:24,546 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:24,546 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:24,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:24,547 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:24,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911577036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:24,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:24,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:24,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000224982] [2021-06-12 20:01:24,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:24,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:24,604 INFO L87 Difference]: Start difference. First operand 2179 states and 6294 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:25,199 INFO L93 Difference]: Finished difference Result 2347 states and 6623 transitions. [2021-06-12 20:01:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:01:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:25,202 INFO L225 Difference]: With dead ends: 2347 [2021-06-12 20:01:25,202 INFO L226 Difference]: Without dead ends: 2344 [2021-06-12 20:01:25,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 511.4ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:01:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-06-12 20:01:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2198. [2021-06-12 20:01:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2198 states, 2197 states have (on average 2.8939462903959945) internal successors, (6358), 2197 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2198 states to 2198 states and 6358 transitions. [2021-06-12 20:01:25,228 INFO L78 Accepts]: Start accepts. Automaton has 2198 states and 6358 transitions. Word has length 19 [2021-06-12 20:01:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:25,228 INFO L482 AbstractCegarLoop]: Abstraction has 2198 states and 6358 transitions. [2021-06-12 20:01:25,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2198 states and 6358 transitions. [2021-06-12 20:01:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:25,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:25,230 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:25,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3927,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:25,435 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1882850464, now seen corresponding path program 479 times [2021-06-12 20:01:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:25,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076276730] [2021-06-12 20:01:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:25,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:25,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076276730] [2021-06-12 20:01:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076276730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:25,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700611854] [2021-06-12 20:01:25,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:25,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:01:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:25,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:25,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:25,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:25,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:25,725 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:25,758 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:25,759 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:25,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:25,759 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:25,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700611854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:25,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:25,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:25,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584752437] [2021-06-12 20:01:25,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:25,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:25,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:25,831 INFO L87 Difference]: Start difference. First operand 2198 states and 6358 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:26,473 INFO L93 Difference]: Finished difference Result 2282 states and 6504 transitions. [2021-06-12 20:01:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:01:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:26,476 INFO L225 Difference]: With dead ends: 2282 [2021-06-12 20:01:26,476 INFO L226 Difference]: Without dead ends: 2274 [2021-06-12 20:01:26,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 541.9ms TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:01:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-06-12 20:01:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2208. [2021-06-12 20:01:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.8885364748527413) internal successors, (6375), 2207 states have internal predecessors, (6375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 6375 transitions. [2021-06-12 20:01:26,498 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 6375 transitions. Word has length 19 [2021-06-12 20:01:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:26,499 INFO L482 AbstractCegarLoop]: Abstraction has 2208 states and 6375 transitions. [2021-06-12 20:01:26,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 6375 transitions. [2021-06-12 20:01:26,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:26,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:26,501 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:26,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3931,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:26,701 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:26,701 INFO L82 PathProgramCache]: Analyzing trace with hash -693773126, now seen corresponding path program 480 times [2021-06-12 20:01:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:26,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33876974] [2021-06-12 20:01:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:26,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:26,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33876974] [2021-06-12 20:01:26,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33876974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:26,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285794893] [2021-06-12 20:01:26,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:26,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:01:26,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:26,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:26,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:26,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:26,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:26,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:26,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:26,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:26,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:27,007 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:27,007 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:27,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:27,008 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285794893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:27,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:27,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430574836] [2021-06-12 20:01:27,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:27,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:27,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:27,059 INFO L87 Difference]: Start difference. First operand 2208 states and 6375 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:27,658 INFO L93 Difference]: Finished difference Result 2365 states and 6681 transitions. [2021-06-12 20:01:27,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:01:27,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:27,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:27,661 INFO L225 Difference]: With dead ends: 2365 [2021-06-12 20:01:27,661 INFO L226 Difference]: Without dead ends: 2365 [2021-06-12 20:01:27,661 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 501.0ms TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:01:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-12 20:01:27,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2193. [2021-06-12 20:01:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2192 states have (on average 2.883211678832117) internal successors, (6320), 2192 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 6320 transitions. [2021-06-12 20:01:27,683 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 6320 transitions. Word has length 19 [2021-06-12 20:01:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:27,683 INFO L482 AbstractCegarLoop]: Abstraction has 2193 states and 6320 transitions. [2021-06-12 20:01:27,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 6320 transitions. [2021-06-12 20:01:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:27,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:27,685 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:27,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3936,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:27,885 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:27,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:27,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1890580862, now seen corresponding path program 481 times [2021-06-12 20:01:27,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:27,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478988525] [2021-06-12 20:01:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:27,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:27,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478988525] [2021-06-12 20:01:27,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478988525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:27,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793390629] [2021-06-12 20:01:27,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:28,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:28,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:28,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:28,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,180 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:28,180 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:28,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:28,181 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793390629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:28,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:28,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:28,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100178866] [2021-06-12 20:01:28,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:28,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:28,202 INFO L87 Difference]: Start difference. First operand 2193 states and 6320 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:28,789 INFO L93 Difference]: Finished difference Result 2384 states and 6720 transitions. [2021-06-12 20:01:28,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:01:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:28,792 INFO L225 Difference]: With dead ends: 2384 [2021-06-12 20:01:28,792 INFO L226 Difference]: Without dead ends: 2384 [2021-06-12 20:01:28,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 498.1ms TimeCoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:01:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-12 20:01:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2185. [2021-06-12 20:01:28,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 2.880952380952381) internal successors, (6292), 2184 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 6292 transitions. [2021-06-12 20:01:28,815 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 6292 transitions. Word has length 19 [2021-06-12 20:01:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:28,815 INFO L482 AbstractCegarLoop]: Abstraction has 2185 states and 6292 transitions. [2021-06-12 20:01:28,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 6292 transitions. [2021-06-12 20:01:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:28,817 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:28,817 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:29,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3940,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:29,033 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash 401175866, now seen corresponding path program 482 times [2021-06-12 20:01:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:29,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088478182] [2021-06-12 20:01:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:29,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:29,110 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:29,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088478182] [2021-06-12 20:01:29,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088478182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033596505] [2021-06-12 20:01:29,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:29,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:29,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:29,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:29,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:29,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:29,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:29,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:29,298 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,320 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:29,320 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:29,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:29,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:29,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033596505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:29,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:29,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:01:29,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359178891] [2021-06-12 20:01:29,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:01:29,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:29,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:01:29,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:01:29,343 INFO L87 Difference]: Start difference. First operand 2185 states and 6292 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:29,653 INFO L93 Difference]: Finished difference Result 2349 states and 6659 transitions. [2021-06-12 20:01:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:01:29,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:29,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:29,656 INFO L225 Difference]: With dead ends: 2349 [2021-06-12 20:01:29,656 INFO L226 Difference]: Without dead ends: 2349 [2021-06-12 20:01:29,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-06-12 20:01:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2173. [2021-06-12 20:01:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 2.882136279926335) internal successors, (6260), 2172 states have internal predecessors, (6260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 6260 transitions. [2021-06-12 20:01:29,677 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 6260 transitions. Word has length 19 [2021-06-12 20:01:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:29,677 INFO L482 AbstractCegarLoop]: Abstraction has 2173 states and 6260 transitions. [2021-06-12 20:01:29,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 6260 transitions. [2021-06-12 20:01:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:29,679 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:29,679 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:29,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3943,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:29,880 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:29,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:29,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1275013240, now seen corresponding path program 483 times [2021-06-12 20:01:29,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:29,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939250062] [2021-06-12 20:01:29,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:30,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939250062] [2021-06-12 20:01:30,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939250062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157501080] [2021-06-12 20:01:30,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:30,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:01:30,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:30,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:30,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:30,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:30,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:30,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:30,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:30,230 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:30,230 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:30,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:30,231 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:30,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157501080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:30,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:30,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:30,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221862928] [2021-06-12 20:01:30,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:30,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:30,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:30,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:30,291 INFO L87 Difference]: Start difference. First operand 2173 states and 6260 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:30,777 INFO L93 Difference]: Finished difference Result 2397 states and 6740 transitions. [2021-06-12 20:01:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:01:30,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:30,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:30,780 INFO L225 Difference]: With dead ends: 2397 [2021-06-12 20:01:30,780 INFO L226 Difference]: Without dead ends: 2396 [2021-06-12 20:01:30,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:01:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-12 20:01:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2189. [2021-06-12 20:01:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.882998171846435) internal successors, (6308), 2188 states have internal predecessors, (6308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 6308 transitions. [2021-06-12 20:01:30,803 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 6308 transitions. Word has length 19 [2021-06-12 20:01:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:30,803 INFO L482 AbstractCegarLoop]: Abstraction has 2189 states and 6308 transitions. [2021-06-12 20:01:30,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 6308 transitions. [2021-06-12 20:01:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:30,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:30,805 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:31,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3946 [2021-06-12 20:01:31,013 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2076629468, now seen corresponding path program 484 times [2021-06-12 20:01:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:31,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354936233] [2021-06-12 20:01:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:31,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:31,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354936233] [2021-06-12 20:01:31,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354936233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:31,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381456223] [2021-06-12 20:01:31,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:31,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:31,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:31,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:31,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:31,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:31,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:31,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:31,330 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:31,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:31,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:31,366 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:31,366 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:31,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:31,367 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:31,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381456223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:31,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:31,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:31,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812751453] [2021-06-12 20:01:31,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:31,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:31,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:31,445 INFO L87 Difference]: Start difference. First operand 2189 states and 6308 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:32,579 INFO L93 Difference]: Finished difference Result 2373 states and 6622 transitions. [2021-06-12 20:01:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:01:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:32,582 INFO L225 Difference]: With dead ends: 2373 [2021-06-12 20:01:32,582 INFO L226 Difference]: Without dead ends: 2361 [2021-06-12 20:01:32,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 982.3ms TimeCoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:01:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-12 20:01:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2185. [2021-06-12 20:01:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 2.874084249084249) internal successors, (6277), 2184 states have internal predecessors, (6277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 6277 transitions. [2021-06-12 20:01:32,605 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 6277 transitions. Word has length 19 [2021-06-12 20:01:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:32,605 INFO L482 AbstractCegarLoop]: Abstraction has 2185 states and 6277 transitions. [2021-06-12 20:01:32,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 6277 transitions. [2021-06-12 20:01:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:32,607 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:32,607 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:32,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3950,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:32,807 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash -499994122, now seen corresponding path program 485 times [2021-06-12 20:01:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:32,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005652698] [2021-06-12 20:01:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:32,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005652698] [2021-06-12 20:01:32,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005652698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356363015] [2021-06-12 20:01:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:32,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:01:32,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:32,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:33,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:33,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:33,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:33,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:33,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:33,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:33,127 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:33,127 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:33,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:33,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356363015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:33,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023814107] [2021-06-12 20:01:33,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:33,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:33,179 INFO L87 Difference]: Start difference. First operand 2185 states and 6277 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:34,084 INFO L93 Difference]: Finished difference Result 2357 states and 6572 transitions. [2021-06-12 20:01:34,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:01:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:34,087 INFO L225 Difference]: With dead ends: 2357 [2021-06-12 20:01:34,087 INFO L226 Difference]: Without dead ends: 2353 [2021-06-12 20:01:34,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:01:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-12 20:01:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2153. [2021-06-12 20:01:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.8615241635687734) internal successors, (6158), 2152 states have internal predecessors, (6158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 6158 transitions. [2021-06-12 20:01:34,109 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 6158 transitions. Word has length 19 [2021-06-12 20:01:34,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:34,109 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 6158 transitions. [2021-06-12 20:01:34,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:34,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 6158 transitions. [2021-06-12 20:01:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:34,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:34,111 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:34,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3955 [2021-06-12 20:01:34,311 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2084359866, now seen corresponding path program 486 times [2021-06-12 20:01:34,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:34,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419654132] [2021-06-12 20:01:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:34,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419654132] [2021-06-12 20:01:34,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419654132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672751578] [2021-06-12 20:01:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:34,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:01:34,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:34,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:34,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:34,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:34,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:34,615 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,637 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:34,637 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:34,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:34,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:34,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672751578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:34,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:34,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:34,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266546643] [2021-06-12 20:01:34,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:34,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:34,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:34,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:34,660 INFO L87 Difference]: Start difference. First operand 2153 states and 6158 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:35,580 INFO L93 Difference]: Finished difference Result 2535 states and 6885 transitions. [2021-06-12 20:01:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:01:35,580 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:35,582 INFO L225 Difference]: With dead ends: 2535 [2021-06-12 20:01:35,582 INFO L226 Difference]: Without dead ends: 2535 [2021-06-12 20:01:35,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 721.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:01:35,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-12 20:01:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 2099. [2021-06-12 20:01:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 2.8512869399428027) internal successors, (5982), 2098 states have internal predecessors, (5982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 5982 transitions. [2021-06-12 20:01:35,604 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 5982 transitions. Word has length 19 [2021-06-12 20:01:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:35,604 INFO L482 AbstractCegarLoop]: Abstraction has 2099 states and 5982 transitions. [2021-06-12 20:01:35,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 5982 transitions. [2021-06-12 20:01:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:35,606 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:35,606 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:35,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3959,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:35,807 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:35,807 INFO L82 PathProgramCache]: Analyzing trace with hash 594954870, now seen corresponding path program 487 times [2021-06-12 20:01:35,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:35,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244609760] [2021-06-12 20:01:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:35,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244609760] [2021-06-12 20:01:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244609760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453218276] [2021-06-12 20:01:35,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:35,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:35,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:36,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:36,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:36,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:36,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,160 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:36,160 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:36,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:36,161 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:36,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453218276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:36,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:36,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:36,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235978164] [2021-06-12 20:01:36,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:36,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:36,186 INFO L87 Difference]: Start difference. First operand 2099 states and 5982 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:37,428 INFO L93 Difference]: Finished difference Result 2411 states and 6591 transitions. [2021-06-12 20:01:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:01:37,428 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:37,431 INFO L225 Difference]: With dead ends: 2411 [2021-06-12 20:01:37,431 INFO L226 Difference]: Without dead ends: 2411 [2021-06-12 20:01:37,431 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1054.6ms TimeCoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:01:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-06-12 20:01:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 2081. [2021-06-12 20:01:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 2.84375) internal successors, (5915), 2080 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 5915 transitions. [2021-06-12 20:01:37,452 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 5915 transitions. Word has length 19 [2021-06-12 20:01:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:37,452 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 5915 transitions. [2021-06-12 20:01:37,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 5915 transitions. [2021-06-12 20:01:37,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:37,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:37,454 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:37,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3962,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:37,661 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1668040250, now seen corresponding path program 488 times [2021-06-12 20:01:37,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:37,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674317842] [2021-06-12 20:01:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:37,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674317842] [2021-06-12 20:01:37,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674317842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:37,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017474599] [2021-06-12 20:01:37,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:37,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:37,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:37,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:37,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:38,001 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,027 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:38,027 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:38,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:38,028 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:38,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017474599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:38,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:38,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323762488] [2021-06-12 20:01:38,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:38,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:38,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:38,055 INFO L87 Difference]: Start difference. First operand 2081 states and 5915 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:38,484 INFO L93 Difference]: Finished difference Result 2196 states and 6134 transitions. [2021-06-12 20:01:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:01:38,484 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:38,486 INFO L225 Difference]: With dead ends: 2196 [2021-06-12 20:01:38,486 INFO L226 Difference]: Without dead ends: 2196 [2021-06-12 20:01:38,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:38,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2196 states. [2021-06-12 20:01:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2196 to 2060. [2021-06-12 20:01:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 2.8411850412821757) internal successors, (5850), 2059 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 5850 transitions. [2021-06-12 20:01:38,506 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 5850 transitions. Word has length 19 [2021-06-12 20:01:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:38,506 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 5850 transitions. [2021-06-12 20:01:38,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 5850 transitions. [2021-06-12 20:01:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:38,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:38,508 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:38,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3965,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:38,724 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:38,724 INFO L82 PathProgramCache]: Analyzing trace with hash -143150182, now seen corresponding path program 489 times [2021-06-12 20:01:38,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:38,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354198521] [2021-06-12 20:01:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:01:38,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354198521] [2021-06-12 20:01:38,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354198521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136059812] [2021-06-12 20:01:38,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:38,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:01:38,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:38,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:39,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:39,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:39,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:39,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:39,059 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:39,059 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:39,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:39,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136059812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:39,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:39,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711028130] [2021-06-12 20:01:39,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:39,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:39,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:39,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:39,124 INFO L87 Difference]: Start difference. First operand 2060 states and 5850 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:39,555 INFO L93 Difference]: Finished difference Result 2143 states and 6007 transitions. [2021-06-12 20:01:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:01:39,555 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:39,557 INFO L225 Difference]: With dead ends: 2143 [2021-06-12 20:01:39,557 INFO L226 Difference]: Without dead ends: 2139 [2021-06-12 20:01:39,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:01:39,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2021-06-12 20:01:39,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2068. [2021-06-12 20:01:39,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2067 states have (on average 2.840832123850992) internal successors, (5872), 2067 states have internal predecessors, (5872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 5872 transitions. [2021-06-12 20:01:39,577 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 5872 transitions. Word has length 19 [2021-06-12 20:01:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:39,577 INFO L482 AbstractCegarLoop]: Abstraction has 2068 states and 5872 transitions. [2021-06-12 20:01:39,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 5872 transitions. [2021-06-12 20:01:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:39,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:39,579 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:39,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3968 [2021-06-12 20:01:39,780 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:39,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:39,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1585897152, now seen corresponding path program 490 times [2021-06-12 20:01:39,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:39,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102394082] [2021-06-12 20:01:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:39,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:01:39,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102394082] [2021-06-12 20:01:39,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102394082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:39,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485348054] [2021-06-12 20:01:39,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:39,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:39,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:39,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:40,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:40,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:40,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:40,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:40,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:40,105 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:40,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:40,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:40,112 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:40,140 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:01:40,141 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:40,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:40,141 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:01:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:40,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485348054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:40,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:40,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531806819] [2021-06-12 20:01:40,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:40,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:40,170 INFO L87 Difference]: Start difference. First operand 2068 states and 5872 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:40,575 INFO L93 Difference]: Finished difference Result 2118 states and 5951 transitions. [2021-06-12 20:01:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:01:40,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:40,578 INFO L225 Difference]: With dead ends: 2118 [2021-06-12 20:01:40,578 INFO L226 Difference]: Without dead ends: 2110 [2021-06-12 20:01:40,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:01:40,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-06-12 20:01:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2067. [2021-06-12 20:01:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.839303000968054) internal successors, (5866), 2066 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5866 transitions. [2021-06-12 20:01:40,600 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5866 transitions. Word has length 19 [2021-06-12 20:01:40,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:40,600 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 5866 transitions. [2021-06-12 20:01:40,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5866 transitions. [2021-06-12 20:01:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:40,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:40,602 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:40,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3974 [2021-06-12 20:01:40,802 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:40,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash -648210342, now seen corresponding path program 491 times [2021-06-12 20:01:40,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:40,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017535358] [2021-06-12 20:01:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:01:40,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:40,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017535358] [2021-06-12 20:01:40,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017535358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:40,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660431268] [2021-06-12 20:01:40,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:40,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:01:40,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:40,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:40,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:41,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:41,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:41,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:41,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:41,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:41,154 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:41,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:41,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:41,186 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:01:41,187 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:41,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:41,188 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:01:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:41,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660431268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:41,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:41,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:41,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777423456] [2021-06-12 20:01:41,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:41,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:41,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:41,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:41,218 INFO L87 Difference]: Start difference. First operand 2067 states and 5866 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:41,723 INFO L93 Difference]: Finished difference Result 2121 states and 5951 transitions. [2021-06-12 20:01:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:01:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:41,726 INFO L225 Difference]: With dead ends: 2121 [2021-06-12 20:01:41,726 INFO L226 Difference]: Without dead ends: 2109 [2021-06-12 20:01:41,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 518.0ms TimeCoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:01:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-12 20:01:41,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 2066. [2021-06-12 20:01:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.8372881355932202) internal successors, (5859), 2065 states have internal predecessors, (5859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5859 transitions. [2021-06-12 20:01:41,746 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5859 transitions. Word has length 19 [2021-06-12 20:01:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:41,746 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5859 transitions. [2021-06-12 20:01:41,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5859 transitions. [2021-06-12 20:01:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:41,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:41,747 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:41,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3981,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:41,948 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1186065920, now seen corresponding path program 492 times [2021-06-12 20:01:41,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:41,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949137758] [2021-06-12 20:01:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:01:42,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949137758] [2021-06-12 20:01:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949137758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646140100] [2021-06-12 20:01:42,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:42,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:01:42,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:42,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:42,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:42,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:42,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:42,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:42,304 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:01:42,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:42,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:42,310 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:42,339 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:01:42,340 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:42,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:42,341 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:01:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:42,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646140100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:42,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:42,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:01:42,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331320453] [2021-06-12 20:01:42,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:01:42,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:01:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:01:42,370 INFO L87 Difference]: Start difference. First operand 2066 states and 5859 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:42,738 INFO L93 Difference]: Finished difference Result 2106 states and 5923 transitions. [2021-06-12 20:01:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:01:42,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:42,741 INFO L225 Difference]: With dead ends: 2106 [2021-06-12 20:01:42,741 INFO L226 Difference]: Without dead ends: 2090 [2021-06-12 20:01:42,741 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:01:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-06-12 20:01:42,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2066. [2021-06-12 20:01:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 2.834866828087167) internal successors, (5854), 2065 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 5854 transitions. [2021-06-12 20:01:42,762 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 5854 transitions. Word has length 19 [2021-06-12 20:01:42,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:42,762 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 5854 transitions. [2021-06-12 20:01:42,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:42,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 5854 transitions. [2021-06-12 20:01:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:42,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:42,764 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:42,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3988 [2021-06-12 20:01:42,965 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:42,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:42,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1307772228, now seen corresponding path program 493 times [2021-06-12 20:01:42,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:42,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595421575] [2021-06-12 20:01:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:43,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:43,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595421575] [2021-06-12 20:01:43,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595421575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182914061] [2021-06-12 20:01:43,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:43,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:43,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:43,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:43,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:43,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:43,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:43,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:43,362 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:43,396 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:43,396 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:43,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:43,396 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:43,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182914061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:43,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:43,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:43,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875052975] [2021-06-12 20:01:43,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:43,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:43,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:43,460 INFO L87 Difference]: Start difference. First operand 2066 states and 5854 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:43,932 INFO L93 Difference]: Finished difference Result 2263 states and 6214 transitions. [2021-06-12 20:01:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:01:43,936 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:43,939 INFO L225 Difference]: With dead ends: 2263 [2021-06-12 20:01:43,940 INFO L226 Difference]: Without dead ends: 2263 [2021-06-12 20:01:43,940 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:01:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2021-06-12 20:01:43,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 2094. [2021-06-12 20:01:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.84089823220258) internal successors, (5946), 2093 states have internal predecessors, (5946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5946 transitions. [2021-06-12 20:01:43,971 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5946 transitions. Word has length 19 [2021-06-12 20:01:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:43,971 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5946 transitions. [2021-06-12 20:01:43,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5946 transitions. [2021-06-12 20:01:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:43,974 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:43,974 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:44,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:44,177 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash -506156000, now seen corresponding path program 494 times [2021-06-12 20:01:44,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:44,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817732995] [2021-06-12 20:01:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:44,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817732995] [2021-06-12 20:01:44,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817732995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:44,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556390335] [2021-06-12 20:01:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:44,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:44,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:44,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:44,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:44,561 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:44,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:44,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:44,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:44,599 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:44,599 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:44,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:44,599 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:44,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556390335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:44,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:44,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:44,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125495522] [2021-06-12 20:01:44,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:44,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:44,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:44,681 INFO L87 Difference]: Start difference. First operand 2094 states and 5946 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:46,030 INFO L93 Difference]: Finished difference Result 2277 states and 6275 transitions. [2021-06-12 20:01:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:01:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:46,033 INFO L225 Difference]: With dead ends: 2277 [2021-06-12 20:01:46,033 INFO L226 Difference]: Without dead ends: 2265 [2021-06-12 20:01:46,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1221.6ms TimeCoverageRelationStatistics Valid=212, Invalid=1858, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:01:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-06-12 20:01:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2111. [2021-06-12 20:01:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 2.844075829383886) internal successors, (6001), 2110 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 6001 transitions. [2021-06-12 20:01:46,055 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 6001 transitions. Word has length 19 [2021-06-12 20:01:46,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:46,055 INFO L482 AbstractCegarLoop]: Abstraction has 2111 states and 6001 transitions. [2021-06-12 20:01:46,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 6001 transitions. [2021-06-12 20:01:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:46,057 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:46,057 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:46,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3999 [2021-06-12 20:01:46,258 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:46,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:46,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1212187706, now seen corresponding path program 495 times [2021-06-12 20:01:46,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:46,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779183958] [2021-06-12 20:01:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779183958] [2021-06-12 20:01:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779183958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386927140] [2021-06-12 20:01:46,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:46,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:01:46,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:46,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:46,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:46,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:46,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:46,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:46,608 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:46,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:46,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:46,644 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:01:46,644 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:46,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:01:46,645 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:01:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:46,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386927140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:46,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:46,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:46,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640962394] [2021-06-12 20:01:46,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:46,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:46,701 INFO L87 Difference]: Start difference. First operand 2111 states and 6001 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:47,348 INFO L93 Difference]: Finished difference Result 2246 states and 6234 transitions. [2021-06-12 20:01:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:01:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:47,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:47,351 INFO L225 Difference]: With dead ends: 2246 [2021-06-12 20:01:47,351 INFO L226 Difference]: Without dead ends: 2246 [2021-06-12 20:01:47,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 646.3ms TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:01:47,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-12 20:01:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 2106. [2021-06-12 20:01:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2106 states, 2105 states have (on average 2.841330166270784) internal successors, (5981), 2105 states have internal predecessors, (5981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2106 states to 2106 states and 5981 transitions. [2021-06-12 20:01:47,377 INFO L78 Accepts]: Start accepts. Automaton has 2106 states and 5981 transitions. Word has length 19 [2021-06-12 20:01:47,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:47,377 INFO L482 AbstractCegarLoop]: Abstraction has 2106 states and 5981 transitions. [2021-06-12 20:01:47,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2106 states and 5981 transitions. [2021-06-12 20:01:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:47,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:47,379 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:47,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4004,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:47,579 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:47,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash -498425602, now seen corresponding path program 496 times [2021-06-12 20:01:47,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:47,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062159146] [2021-06-12 20:01:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:47,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062159146] [2021-06-12 20:01:47,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062159146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:47,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216455238] [2021-06-12 20:01:47,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:47,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:47,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:47,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:47,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:47,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:47,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:47,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:47,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,000 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:48,000 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:48,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:48,001 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:48,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216455238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:48,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:48,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:48,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975659528] [2021-06-12 20:01:48,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:48,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:48,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:48,026 INFO L87 Difference]: Start difference. First operand 2106 states and 5981 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:49,082 INFO L93 Difference]: Finished difference Result 2384 states and 6529 transitions. [2021-06-12 20:01:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:01:49,082 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:49,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:49,085 INFO L225 Difference]: With dead ends: 2384 [2021-06-12 20:01:49,085 INFO L226 Difference]: Without dead ends: 2384 [2021-06-12 20:01:49,086 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:01:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2021-06-12 20:01:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2130. [2021-06-12 20:01:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2130 states, 2129 states have (on average 2.8511038046031) internal successors, (6070), 2129 states have internal predecessors, (6070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2130 states to 2130 states and 6070 transitions. [2021-06-12 20:01:49,110 INFO L78 Accepts]: Start accepts. Automaton has 2130 states and 6070 transitions. Word has length 19 [2021-06-12 20:01:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:49,110 INFO L482 AbstractCegarLoop]: Abstraction has 2130 states and 6070 transitions. [2021-06-12 20:01:49,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2130 states and 6070 transitions. [2021-06-12 20:01:49,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:49,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:49,112 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:49,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:49,328 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:49,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1987830598, now seen corresponding path program 497 times [2021-06-12 20:01:49,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:49,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961996700] [2021-06-12 20:01:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:49,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:49,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961996700] [2021-06-12 20:01:49,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961996700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:49,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832709856] [2021-06-12 20:01:49,456 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:49,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:01:49,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:49,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:49,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:49,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:49,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:49,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:49,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,744 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:49,744 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:49,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:49,745 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:49,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832709856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:49,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:49,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:49,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990148537] [2021-06-12 20:01:49,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:49,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:49,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:49,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:49,770 INFO L87 Difference]: Start difference. First operand 2130 states and 6070 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:51,916 INFO L93 Difference]: Finished difference Result 2569 states and 6877 transitions. [2021-06-12 20:01:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 20:01:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:51,918 INFO L225 Difference]: With dead ends: 2569 [2021-06-12 20:01:51,919 INFO L226 Difference]: Without dead ends: 2569 [2021-06-12 20:01:51,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1564.9ms TimeCoverageRelationStatistics Valid=483, Invalid=4629, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 20:01:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-06-12 20:01:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 2123. [2021-06-12 20:01:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 2.8482563619227146) internal successors, (6044), 2122 states have internal predecessors, (6044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6044 transitions. [2021-06-12 20:01:51,944 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6044 transitions. Word has length 19 [2021-06-12 20:01:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:51,944 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 6044 transitions. [2021-06-12 20:01:51,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6044 transitions. [2021-06-12 20:01:51,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:51,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:51,946 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:52,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-06-12 20:01:52,153 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:52,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:52,156 INFO L82 PathProgramCache]: Analyzing trace with hash -914745218, now seen corresponding path program 498 times [2021-06-12 20:01:52,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:52,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953054761] [2021-06-12 20:01:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:52,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953054761] [2021-06-12 20:01:52,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953054761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460184747] [2021-06-12 20:01:52,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:52,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:01:52,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:52,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:52,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:52,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,563 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:52,563 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:52,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:52,564 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:52,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460184747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:52,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:52,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:52,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689751782] [2021-06-12 20:01:52,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:52,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:52,597 INFO L87 Difference]: Start difference. First operand 2123 states and 6044 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:55,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:55,316 INFO L93 Difference]: Finished difference Result 2444 states and 6649 transitions. [2021-06-12 20:01:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-12 20:01:55,316 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:55,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:55,319 INFO L225 Difference]: With dead ends: 2444 [2021-06-12 20:01:55,319 INFO L226 Difference]: Without dead ends: 2444 [2021-06-12 20:01:55,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2471 ImplicationChecksByTransitivity, 2224.3ms TimeCoverageRelationStatistics Valid=761, Invalid=6895, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 20:01:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-12 20:01:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2101. [2021-06-12 20:01:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.840952380952381) internal successors, (5966), 2100 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5966 transitions. [2021-06-12 20:01:55,344 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5966 transitions. Word has length 19 [2021-06-12 20:01:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:55,344 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 5966 transitions. [2021-06-12 20:01:55,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5966 transitions. [2021-06-12 20:01:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:55,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:55,346 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:55,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4014,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:55,546 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:55,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2008836806, now seen corresponding path program 499 times [2021-06-12 20:01:55,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:55,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357384485] [2021-06-12 20:01:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:55,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357384485] [2021-06-12 20:01:55,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357384485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250666682] [2021-06-12 20:01:55,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:55,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:55,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:55,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:55,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:55,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:55,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,959 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:01:55,959 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:55,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:55,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:01:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:55,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250666682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:55,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:55,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:01:55,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056100041] [2021-06-12 20:01:55,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:01:55,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:01:55,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:55,989 INFO L87 Difference]: Start difference. First operand 2101 states and 5966 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:56,321 INFO L93 Difference]: Finished difference Result 2165 states and 6085 transitions. [2021-06-12 20:01:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:01:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:56,324 INFO L225 Difference]: With dead ends: 2165 [2021-06-12 20:01:56,324 INFO L226 Difference]: Without dead ends: 2165 [2021-06-12 20:01:56,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:01:56,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2021-06-12 20:01:56,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2101. [2021-06-12 20:01:56,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 2100 states have (on average 2.840952380952381) internal successors, (5966), 2100 states have internal predecessors, (5966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 5966 transitions. [2021-06-12 20:01:56,346 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 5966 transitions. Word has length 19 [2021-06-12 20:01:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:56,346 INFO L482 AbstractCegarLoop]: Abstraction has 2101 states and 5966 transitions. [2021-06-12 20:01:56,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 5966 transitions. [2021-06-12 20:01:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:56,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:56,348 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:56,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:56,557 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:56,557 INFO L82 PathProgramCache]: Analyzing trace with hash 716334810, now seen corresponding path program 500 times [2021-06-12 20:01:56,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:56,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20861460] [2021-06-12 20:01:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:56,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:56,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20861460] [2021-06-12 20:01:56,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20861460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200157349] [2021-06-12 20:01:56,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:56,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:01:56,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:56,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:56,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:56,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:56,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:56,913 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,932 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:01:56,932 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:56,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:56,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:01:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:56,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200157349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:56,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:56,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:01:56,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769096869] [2021-06-12 20:01:56,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:01:56,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:56,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:01:56,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:56,963 INFO L87 Difference]: Start difference. First operand 2101 states and 5966 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:57,349 INFO L93 Difference]: Finished difference Result 2318 states and 6445 transitions. [2021-06-12 20:01:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:01:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:57,352 INFO L225 Difference]: With dead ends: 2318 [2021-06-12 20:01:57,352 INFO L226 Difference]: Without dead ends: 2318 [2021-06-12 20:01:57,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-12 20:01:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2194. [2021-06-12 20:01:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 2.8568171454628364) internal successors, (6265), 2193 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6265 transitions. [2021-06-12 20:01:57,377 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6265 transitions. Word has length 19 [2021-06-12 20:01:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:57,377 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6265 transitions. [2021-06-12 20:01:57,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:57,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6265 transitions. [2021-06-12 20:01:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:57,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:57,380 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:57,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4020 [2021-06-12 20:01:57,596 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:57,596 INFO L82 PathProgramCache]: Analyzing trace with hash -491076034, now seen corresponding path program 501 times [2021-06-12 20:01:57,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:57,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350379606] [2021-06-12 20:01:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:57,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:57,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:57,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350379606] [2021-06-12 20:01:57,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350379606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:57,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790112628] [2021-06-12 20:01:57,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:57,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:01:57,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:57,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:57,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:57,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:01:57,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:57,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:57,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:58,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:58,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:58,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:01:58,008 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:01:58,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:58,039 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:01:58,039 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:58,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:01:58,040 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:01:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:58,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790112628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:58,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:58,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:01:58,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210802804] [2021-06-12 20:01:58,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:01:58,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:01:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:58,079 INFO L87 Difference]: Start difference. First operand 2194 states and 6265 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:01:58,725 INFO L93 Difference]: Finished difference Result 2298 states and 6393 transitions. [2021-06-12 20:01:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:01:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:01:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:01:58,728 INFO L225 Difference]: With dead ends: 2298 [2021-06-12 20:01:58,728 INFO L226 Difference]: Without dead ends: 2288 [2021-06-12 20:01:58,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 605.8ms TimeCoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:01:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2288 states. [2021-06-12 20:01:58,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2288 to 2205. [2021-06-12 20:01:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 2.8484573502722323) internal successors, (6278), 2204 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 6278 transitions. [2021-06-12 20:01:58,752 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 6278 transitions. Word has length 19 [2021-06-12 20:01:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:01:58,752 INFO L482 AbstractCegarLoop]: Abstraction has 2205 states and 6278 transitions. [2021-06-12 20:01:58,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:01:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 6278 transitions. [2021-06-12 20:01:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:01:58,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:01:58,754 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:01:58,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-12 20:01:58,961 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:01:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:01:58,961 INFO L82 PathProgramCache]: Analyzing trace with hash -915612356, now seen corresponding path program 502 times [2021-06-12 20:01:58,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:01:58,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211901470] [2021-06-12 20:01:58,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:01:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:01:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:01:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211901470] [2021-06-12 20:01:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211901470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321437716] [2021-06-12 20:01:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:01:59,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:01:59,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:01:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:01:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:01:59,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:59,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:59,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:01:59,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:01:59,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:01:59,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,353 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:01:59,353 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:01:59,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:01:59,354 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:01:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:01:59,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321437716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:01:59,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:01:59,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:01:59,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982957716] [2021-06-12 20:01:59,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:01:59,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:01:59,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:01:59,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:01:59,384 INFO L87 Difference]: Start difference. First operand 2205 states and 6278 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:01,382 INFO L93 Difference]: Finished difference Result 2504 states and 6789 transitions. [2021-06-12 20:02:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:02:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:01,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:01,385 INFO L225 Difference]: With dead ends: 2504 [2021-06-12 20:02:01,385 INFO L226 Difference]: Without dead ends: 2504 [2021-06-12 20:02:01,386 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1658.7ms TimeCoverageRelationStatistics Valid=505, Invalid=4325, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 20:02:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-06-12 20:02:01,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2206. [2021-06-12 20:02:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.852607709750567) internal successors, (6290), 2205 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6290 transitions. [2021-06-12 20:02:01,410 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6290 transitions. Word has length 19 [2021-06-12 20:02:01,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:01,410 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6290 transitions. [2021-06-12 20:02:01,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:01,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6290 transitions. [2021-06-12 20:02:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:01,412 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:01,412 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:01,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4027,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:01,629 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:01,629 INFO L82 PathProgramCache]: Analyzing trace with hash 15270232, now seen corresponding path program 503 times [2021-06-12 20:02:01,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:01,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443637925] [2021-06-12 20:02:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:01,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:01,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443637925] [2021-06-12 20:02:01,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443637925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:01,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751628205] [2021-06-12 20:02:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:01,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:02:01,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:01,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:01,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:02,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:02,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:02,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:02,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:02,037 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:02,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:02,042 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:02,044 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:02,071 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:02:02,071 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:02,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:02,072 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:02:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:02,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751628205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:02,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:02,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:02,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430471691] [2021-06-12 20:02:02,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:02,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:02,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:02,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:02,110 INFO L87 Difference]: Start difference. First operand 2206 states and 6290 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:02,935 INFO L93 Difference]: Finished difference Result 2327 states and 6443 transitions. [2021-06-12 20:02:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:02:02,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:02,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:02,938 INFO L225 Difference]: With dead ends: 2327 [2021-06-12 20:02:02,938 INFO L226 Difference]: Without dead ends: 2319 [2021-06-12 20:02:02,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 800.6ms TimeCoverageRelationStatistics Valid=203, Invalid=1959, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:02:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-12 20:02:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 2213. [2021-06-12 20:02:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 2212 states have (on average 2.848101265822785) internal successors, (6300), 2212 states have internal predecessors, (6300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 6300 transitions. [2021-06-12 20:02:02,962 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 6300 transitions. Word has length 19 [2021-06-12 20:02:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:02,963 INFO L482 AbstractCegarLoop]: Abstraction has 2213 states and 6300 transitions. [2021-06-12 20:02:02,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 6300 transitions. [2021-06-12 20:02:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:02,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:02,965 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:03,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4029,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:03,181 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:03,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:03,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2076634470, now seen corresponding path program 504 times [2021-06-12 20:02:03,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:03,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41594240] [2021-06-12 20:02:03,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:03,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:03,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:03,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41594240] [2021-06-12 20:02:03,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41594240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:03,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597254254] [2021-06-12 20:02:03,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:03,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:03,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:03,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:03,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:03,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:03,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:03,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:03,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:03,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,586 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:02:03,586 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:03,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:03,586 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:02:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:03,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597254254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:03,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:03,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:03,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255507184] [2021-06-12 20:02:03,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:03,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:03,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:03,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:03,615 INFO L87 Difference]: Start difference. First operand 2213 states and 6300 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:05,987 INFO L93 Difference]: Finished difference Result 2633 states and 7053 transitions. [2021-06-12 20:02:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 20:02:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:05,989 INFO L225 Difference]: With dead ends: 2633 [2021-06-12 20:02:05,989 INFO L226 Difference]: Without dead ends: 2633 [2021-06-12 20:02:05,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 1853.6ms TimeCoverageRelationStatistics Valid=521, Invalid=5331, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 20:02:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-06-12 20:02:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2206. [2021-06-12 20:02:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 2.854421768707483) internal successors, (6294), 2205 states have internal predecessors, (6294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 6294 transitions. [2021-06-12 20:02:06,014 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 6294 transitions. Word has length 19 [2021-06-12 20:02:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:06,014 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 6294 transitions. [2021-06-12 20:02:06,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:06,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 6294 transitions. [2021-06-12 20:02:06,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:06,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:06,016 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:06,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4034 [2021-06-12 20:02:06,232 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:06,233 INFO L82 PathProgramCache]: Analyzing trace with hash -522585346, now seen corresponding path program 505 times [2021-06-12 20:02:06,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:06,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265798873] [2021-06-12 20:02:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:06,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265798873] [2021-06-12 20:02:06,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265798873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287874448] [2021-06-12 20:02:06,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:06,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:06,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:06,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:06,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:06,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:06,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:06,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:06,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:06,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:06,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:06,654 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:02:06,654 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:06,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:06,654 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:02:06,691 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:06,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287874448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:06,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:06,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:06,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378179330] [2021-06-12 20:02:06,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:06,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:06,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:06,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:06,692 INFO L87 Difference]: Start difference. First operand 2206 states and 6294 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:07,503 INFO L93 Difference]: Finished difference Result 2308 states and 6426 transitions. [2021-06-12 20:02:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:02:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:07,506 INFO L225 Difference]: With dead ends: 2308 [2021-06-12 20:02:07,506 INFO L226 Difference]: Without dead ends: 2299 [2021-06-12 20:02:07,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 826.4ms TimeCoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:02:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2299 states. [2021-06-12 20:02:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2299 to 2209. [2021-06-12 20:02:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 2.8496376811594204) internal successors, (6292), 2208 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 6292 transitions. [2021-06-12 20:02:07,533 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 6292 transitions. Word has length 19 [2021-06-12 20:02:07,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:07,533 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 6292 transitions. [2021-06-12 20:02:07,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 6292 transitions. [2021-06-12 20:02:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:07,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:07,535 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:07,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4036,510 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:07,766 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1836992132, now seen corresponding path program 506 times [2021-06-12 20:02:07,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:07,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564663992] [2021-06-12 20:02:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:07,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564663992] [2021-06-12 20:02:07,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564663992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659302065] [2021-06-12 20:02:07,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:07,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:07,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:07,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:07,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:08,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:08,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:08,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,225 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:02:08,226 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:08,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:08,226 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:02:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659302065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:08,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:08,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:08,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125381126] [2021-06-12 20:02:08,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:08,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:08,256 INFO L87 Difference]: Start difference. First operand 2209 states and 6292 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:09,698 INFO L93 Difference]: Finished difference Result 2528 states and 6875 transitions. [2021-06-12 20:02:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 20:02:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:09,702 INFO L225 Difference]: With dead ends: 2528 [2021-06-12 20:02:09,702 INFO L226 Difference]: Without dead ends: 2528 [2021-06-12 20:02:09,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1200.9ms TimeCoverageRelationStatistics Valid=308, Invalid=2772, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 20:02:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-12 20:02:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2210. [2021-06-12 20:02:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2210 states, 2209 states have (on average 2.8569488456315075) internal successors, (6311), 2209 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2210 states to 2210 states and 6311 transitions. [2021-06-12 20:02:09,729 INFO L78 Accepts]: Start accepts. Automaton has 2210 states and 6311 transitions. Word has length 19 [2021-06-12 20:02:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:09,729 INFO L482 AbstractCegarLoop]: Abstraction has 2210 states and 6311 transitions. [2021-06-12 20:02:09,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:09,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2210 states and 6311 transitions. [2021-06-12 20:02:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:09,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:09,731 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:09,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4041,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:09,945 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1538274456, now seen corresponding path program 507 times [2021-06-12 20:02:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:09,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012518279] [2021-06-12 20:02:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:10,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:10,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012518279] [2021-06-12 20:02:10,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012518279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:10,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206682480] [2021-06-12 20:02:10,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:10,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:10,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:10,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:10,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:10,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:10,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:10,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:10,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:10,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:10,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:02:10,385 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:10,412 INFO L628 ElimStorePlain]: treesize reduction 21, result has 58.0 percent of original size [2021-06-12 20:02:10,412 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:10,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:10,413 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:125, output treesize:29 [2021-06-12 20:02:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:10,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206682480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:10,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:10,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:10,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139824438] [2021-06-12 20:02:10,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:10,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:10,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:10,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:10,449 INFO L87 Difference]: Start difference. First operand 2210 states and 6311 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:11,299 INFO L93 Difference]: Finished difference Result 2283 states and 6410 transitions. [2021-06-12 20:02:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:02:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:11,302 INFO L225 Difference]: With dead ends: 2283 [2021-06-12 20:02:11,303 INFO L226 Difference]: Without dead ends: 2277 [2021-06-12 20:02:11,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:02:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-12 20:02:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 2211. [2021-06-12 20:02:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 2.853393665158371) internal successors, (6306), 2210 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 6306 transitions. [2021-06-12 20:02:11,326 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 6306 transitions. Word has length 19 [2021-06-12 20:02:11,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:11,326 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 6306 transitions. [2021-06-12 20:02:11,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:11,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 6306 transitions. [2021-06-12 20:02:11,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:11,328 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:11,328 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:11,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-12 20:02:11,544 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:11,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1829261734, now seen corresponding path program 508 times [2021-06-12 20:02:11,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:11,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977194213] [2021-06-12 20:02:11,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:11,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:11,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977194213] [2021-06-12 20:02:11,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977194213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:11,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623399170] [2021-06-12 20:02:11,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:11,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:11,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:11,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:11,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:11,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:11,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:11,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:11,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:11,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:11,917 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:11,949 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:11,949 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:11,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:11,949 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:12,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623399170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:12,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:12,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:12,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842296025] [2021-06-12 20:02:12,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:12,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:12,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:12,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:12,032 INFO L87 Difference]: Start difference. First operand 2211 states and 6306 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:12,971 INFO L93 Difference]: Finished difference Result 2461 states and 6686 transitions. [2021-06-12 20:02:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:02:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:12,974 INFO L225 Difference]: With dead ends: 2461 [2021-06-12 20:02:12,974 INFO L226 Difference]: Without dead ends: 2461 [2021-06-12 20:02:12,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 794.8ms TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:02:12,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-06-12 20:02:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2196. [2021-06-12 20:02:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 2.849658314350797) internal successors, (6255), 2195 states have internal predecessors, (6255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:12,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 6255 transitions. [2021-06-12 20:02:12,999 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 6255 transitions. Word has length 19 [2021-06-12 20:02:12,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:12,999 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 6255 transitions. [2021-06-12 20:02:12,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 6255 transitions. [2021-06-12 20:02:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:13,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:13,001 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:13,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4048,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:13,217 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:13,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1027645506, now seen corresponding path program 509 times [2021-06-12 20:02:13,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:13,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363907589] [2021-06-12 20:02:13,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:13,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:13,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363907589] [2021-06-12 20:02:13,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363907589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:13,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894859802] [2021-06-12 20:02:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:13,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:13,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:13,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:13,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:13,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:13,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:13,605 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:13,636 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:13,637 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:13,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:13,637 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:13,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894859802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:13,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:13,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:13,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248794090] [2021-06-12 20:02:13,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:13,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:13,721 INFO L87 Difference]: Start difference. First operand 2196 states and 6255 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:14,645 INFO L93 Difference]: Finished difference Result 2306 states and 6441 transitions. [2021-06-12 20:02:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:02:14,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:14,659 INFO L225 Difference]: With dead ends: 2306 [2021-06-12 20:02:14,659 INFO L226 Difference]: Without dead ends: 2301 [2021-06-12 20:02:14,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 945.7ms TimeCoverageRelationStatistics Valid=184, Invalid=1376, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:02:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-12 20:02:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2201. [2021-06-12 20:02:14,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 2.8495454545454546) internal successors, (6269), 2200 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 6269 transitions. [2021-06-12 20:02:14,683 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 6269 transitions. Word has length 19 [2021-06-12 20:02:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:14,683 INFO L482 AbstractCegarLoop]: Abstraction has 2201 states and 6269 transitions. [2021-06-12 20:02:14,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 6269 transitions. [2021-06-12 20:02:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:14,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:14,685 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:14,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4052,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:14,901 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash 690698200, now seen corresponding path program 510 times [2021-06-12 20:02:14,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:14,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932985334] [2021-06-12 20:02:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:15,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:15,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932985334] [2021-06-12 20:02:15,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932985334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:15,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766279936] [2021-06-12 20:02:15,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:15,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:15,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:15,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:15,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:15,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:15,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:15,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:15,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:15,302 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:15,334 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:15,334 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:15,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:15,335 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:15,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766279936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:15,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:15,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450255152] [2021-06-12 20:02:15,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:15,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:15,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:15,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:15,396 INFO L87 Difference]: Start difference. First operand 2201 states and 6269 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:15,933 INFO L93 Difference]: Finished difference Result 2295 states and 6427 transitions. [2021-06-12 20:02:15,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:15,933 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:15,936 INFO L225 Difference]: With dead ends: 2295 [2021-06-12 20:02:15,936 INFO L226 Difference]: Without dead ends: 2295 [2021-06-12 20:02:15,936 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:02:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-06-12 20:02:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 2173. [2021-06-12 20:02:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 2.848987108655617) internal successors, (6188), 2172 states have internal predecessors, (6188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:15,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 6188 transitions. [2021-06-12 20:02:15,959 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 6188 transitions. Word has length 19 [2021-06-12 20:02:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:15,959 INFO L482 AbstractCegarLoop]: Abstraction has 2173 states and 6188 transitions. [2021-06-12 20:02:15,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 6188 transitions. [2021-06-12 20:02:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:15,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:15,961 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:16,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4057 [2021-06-12 20:02:16,177 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:16,178 INFO L82 PathProgramCache]: Analyzing trace with hash 221158592, now seen corresponding path program 511 times [2021-06-12 20:02:16,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:16,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844891448] [2021-06-12 20:02:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:16,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:16,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844891448] [2021-06-12 20:02:16,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844891448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:16,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555013899] [2021-06-12 20:02:16,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:16,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:16,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:16,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:16,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:16,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:16,581 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:16,612 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:16,613 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:16,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:16,613 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:16,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555013899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:16,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:16,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:02:16,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645785675] [2021-06-12 20:02:16,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:02:16,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:16,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:02:16,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:16,686 INFO L87 Difference]: Start difference. First operand 2173 states and 6188 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:17,536 INFO L93 Difference]: Finished difference Result 2219 states and 6277 transitions. [2021-06-12 20:02:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:02:17,537 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:17,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:17,539 INFO L225 Difference]: With dead ends: 2219 [2021-06-12 20:02:17,539 INFO L226 Difference]: Without dead ends: 2215 [2021-06-12 20:02:17,539 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 904.0ms TimeCoverageRelationStatistics Valid=197, Invalid=1609, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:02:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2021-06-12 20:02:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2177. [2021-06-12 20:02:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 2.846966911764706) internal successors, (6195), 2176 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 6195 transitions. [2021-06-12 20:02:17,562 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 6195 transitions. Word has length 19 [2021-06-12 20:02:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:17,562 INFO L482 AbstractCegarLoop]: Abstraction has 2177 states and 6195 transitions. [2021-06-12 20:02:17,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:17,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 6195 transitions. [2021-06-12 20:02:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:17,564 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:17,564 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:17,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4061,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:17,780 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1398193498, now seen corresponding path program 512 times [2021-06-12 20:02:17,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:17,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934456668] [2021-06-12 20:02:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:17,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:17,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934456668] [2021-06-12 20:02:17,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934456668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:17,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218260948] [2021-06-12 20:02:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:17,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:17,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:17,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:18,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:18,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:18,049 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:18,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:18,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:18,085 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:18,085 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:18,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:18,085 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:18,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:18,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218260948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:18,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:18,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:18,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689615028] [2021-06-12 20:02:18,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:18,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:18,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:18,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:18,153 INFO L87 Difference]: Start difference. First operand 2177 states and 6195 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:18,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:18,629 INFO L93 Difference]: Finished difference Result 2423 states and 6683 transitions. [2021-06-12 20:02:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:02:18,629 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:18,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:18,632 INFO L225 Difference]: With dead ends: 2423 [2021-06-12 20:02:18,632 INFO L226 Difference]: Without dead ends: 2423 [2021-06-12 20:02:18,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:18,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-12 20:02:18,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2237. [2021-06-12 20:02:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.8564400715563507) internal successors, (6387), 2236 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6387 transitions. [2021-06-12 20:02:18,659 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6387 transitions. Word has length 19 [2021-06-12 20:02:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:18,659 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6387 transitions. [2021-06-12 20:02:18,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:18,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6387 transitions. [2021-06-12 20:02:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:18,661 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:18,662 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:18,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-06-12 20:02:18,879 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2095157570, now seen corresponding path program 513 times [2021-06-12 20:02:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:18,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591217415] [2021-06-12 20:02:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:18,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:18,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591217415] [2021-06-12 20:02:18,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591217415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:18,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567175319] [2021-06-12 20:02:18,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:18,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:02:18,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:19,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:19,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:19,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:19,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:19,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:19,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:19,182 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:19,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:19,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:19,183 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:19,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567175319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:19,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:19,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:19,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801538537] [2021-06-12 20:02:19,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:19,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:19,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:19,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:19,255 INFO L87 Difference]: Start difference. First operand 2237 states and 6387 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:19,988 INFO L93 Difference]: Finished difference Result 2398 states and 6660 transitions. [2021-06-12 20:02:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:02:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:19,991 INFO L225 Difference]: With dead ends: 2398 [2021-06-12 20:02:19,991 INFO L226 Difference]: Without dead ends: 2393 [2021-06-12 20:02:19,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 584.0ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:02:19,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-06-12 20:02:20,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2244. [2021-06-12 20:02:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 2.8586714222024074) internal successors, (6412), 2243 states have internal predecessors, (6412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 6412 transitions. [2021-06-12 20:02:20,017 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 6412 transitions. Word has length 19 [2021-06-12 20:02:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:20,017 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 6412 transitions. [2021-06-12 20:02:20,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 6412 transitions. [2021-06-12 20:02:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:20,019 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:20,019 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:20,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4071,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:20,220 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:20,220 INFO L82 PathProgramCache]: Analyzing trace with hash -376813864, now seen corresponding path program 514 times [2021-06-12 20:02:20,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:20,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278832440] [2021-06-12 20:02:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:20,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:20,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278832440] [2021-06-12 20:02:20,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278832440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607552290] [2021-06-12 20:02:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:20,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:20,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:20,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:20,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:20,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:20,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:20,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:20,512 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:20,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:20,515 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:20,547 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:20,547 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:20,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:20,548 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:20,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607552290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:20,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:20,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:20,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233088042] [2021-06-12 20:02:20,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:20,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:20,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:20,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:20,600 INFO L87 Difference]: Start difference. First operand 2244 states and 6412 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:20,952 INFO L93 Difference]: Finished difference Result 2365 states and 6618 transitions. [2021-06-12 20:02:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:20,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:20,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:20,955 INFO L225 Difference]: With dead ends: 2365 [2021-06-12 20:02:20,955 INFO L226 Difference]: Without dead ends: 2365 [2021-06-12 20:02:20,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:20,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-12 20:02:20,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2237. [2021-06-12 20:02:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.855098389982111) internal successors, (6384), 2236 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6384 transitions. [2021-06-12 20:02:20,977 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6384 transitions. Word has length 19 [2021-06-12 20:02:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:20,977 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6384 transitions. [2021-06-12 20:02:20,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6384 transitions. [2021-06-12 20:02:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:20,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:20,979 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:21,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4076 [2021-06-12 20:02:21,193 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:21,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:21,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2087427172, now seen corresponding path program 515 times [2021-06-12 20:02:21,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:21,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142139870] [2021-06-12 20:02:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:21,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:21,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142139870] [2021-06-12 20:02:21,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142139870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874372024] [2021-06-12 20:02:21,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:21,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:02:21,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:21,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:21,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:21,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:21,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:21,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:21,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,505 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:21,506 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:21,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:21,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:21,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874372024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:21,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:21,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:21,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778313810] [2021-06-12 20:02:21,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:21,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:21,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:21,530 INFO L87 Difference]: Start difference. First operand 2237 states and 6384 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:21,823 INFO L93 Difference]: Finished difference Result 2387 states and 6677 transitions. [2021-06-12 20:02:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:02:21,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:21,826 INFO L225 Difference]: With dead ends: 2387 [2021-06-12 20:02:21,827 INFO L226 Difference]: Without dead ends: 2387 [2021-06-12 20:02:21,827 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-06-12 20:02:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2237. [2021-06-12 20:02:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 2.855098389982111) internal successors, (6384), 2236 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 6384 transitions. [2021-06-12 20:02:21,850 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 6384 transitions. Word has length 19 [2021-06-12 20:02:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:21,850 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 6384 transitions. [2021-06-12 20:02:21,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 6384 transitions. [2021-06-12 20:02:21,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:21,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:21,852 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:22,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4080,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:22,053 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1382020, now seen corresponding path program 516 times [2021-06-12 20:02:22,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:22,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816873813] [2021-06-12 20:02:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:02:22,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:22,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816873813] [2021-06-12 20:02:22,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816873813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667317754] [2021-06-12 20:02:22,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:22,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:02:22,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:22,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:22,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:22,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:22,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:22,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:22,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:22,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:22,334 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:22,367 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:22,367 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:22,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:22,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:22,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667317754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:22,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:22,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-12 20:02:22,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366332831] [2021-06-12 20:02:22,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:22,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:22,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:22,437 INFO L87 Difference]: Start difference. First operand 2237 states and 6384 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:22,928 INFO L93 Difference]: Finished difference Result 2337 states and 6562 transitions. [2021-06-12 20:02:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:02:22,928 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:22,931 INFO L225 Difference]: With dead ends: 2337 [2021-06-12 20:02:22,931 INFO L226 Difference]: Without dead ends: 2333 [2021-06-12 20:02:22,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:02:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-12 20:02:22,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 2251. [2021-06-12 20:02:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2250 states have (on average 2.8537777777777777) internal successors, (6421), 2250 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 6421 transitions. [2021-06-12 20:02:22,977 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 6421 transitions. Word has length 19 [2021-06-12 20:02:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:22,977 INFO L482 AbstractCegarLoop]: Abstraction has 2251 states and 6421 transitions. [2021-06-12 20:02:22,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 6421 transitions. [2021-06-12 20:02:22,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:22,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:22,979 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:23,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4083 [2021-06-12 20:02:23,196 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1727665314, now seen corresponding path program 517 times [2021-06-12 20:02:23,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:23,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868219448] [2021-06-12 20:02:23,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:02:23,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868219448] [2021-06-12 20:02:23,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868219448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169386201] [2021-06-12 20:02:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:23,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:23,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:23,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:23,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:23,477 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:23,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:23,484 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:23,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:23,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:23,490 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:23,519 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:02:23,519 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:23,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:23,520 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:02:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:23,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169386201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:23,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:23,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 19 [2021-06-12 20:02:23,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115528658] [2021-06-12 20:02:23,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:02:23,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:23,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:02:23,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:02:23,547 INFO L87 Difference]: Start difference. First operand 2251 states and 6421 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:23,934 INFO L93 Difference]: Finished difference Result 2280 states and 6460 transitions. [2021-06-12 20:02:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:23,937 INFO L225 Difference]: With dead ends: 2280 [2021-06-12 20:02:23,937 INFO L226 Difference]: Without dead ends: 2272 [2021-06-12 20:02:23,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:02:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-12 20:02:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2247. [2021-06-12 20:02:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 2.852626892252894) internal successors, (6407), 2246 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 6407 transitions. [2021-06-12 20:02:23,961 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 6407 transitions. Word has length 19 [2021-06-12 20:02:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:23,961 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 6407 transitions. [2021-06-12 20:02:23,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:23,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 6407 transitions. [2021-06-12 20:02:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:23,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:23,963 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:24,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4089 [2021-06-12 20:02:24,163 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:24,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:24,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1095473608, now seen corresponding path program 518 times [2021-06-12 20:02:24,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:24,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540458173] [2021-06-12 20:02:24,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:24,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:24,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540458173] [2021-06-12 20:02:24,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540458173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528901318] [2021-06-12 20:02:24,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:24,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:24,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:24,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:24,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:24,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:24,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:24,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:24,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:24,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:24,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:24,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:24,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:24,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:24,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:24,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:24,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:24,479 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:24,479 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:24,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:24,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:24,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:24,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528901318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:24,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:24,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:24,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906248708] [2021-06-12 20:02:24,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:24,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:24,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:24,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:24,544 INFO L87 Difference]: Start difference. First operand 2247 states and 6407 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:25,102 INFO L93 Difference]: Finished difference Result 2328 states and 6530 transitions. [2021-06-12 20:02:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:02:25,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:25,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:25,105 INFO L225 Difference]: With dead ends: 2328 [2021-06-12 20:02:25,105 INFO L226 Difference]: Without dead ends: 2324 [2021-06-12 20:02:25,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 561.5ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2324 states. [2021-06-12 20:02:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2324 to 2242. [2021-06-12 20:02:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 2.8500669344042837) internal successors, (6387), 2241 states have internal predecessors, (6387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 6387 transitions. [2021-06-12 20:02:25,132 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 6387 transitions. Word has length 19 [2021-06-12 20:02:25,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:25,132 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 6387 transitions. [2021-06-12 20:02:25,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:25,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 6387 transitions. [2021-06-12 20:02:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:25,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:25,134 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:25,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-06-12 20:02:25,338 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash 633573726, now seen corresponding path program 519 times [2021-06-12 20:02:25,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:25,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068429587] [2021-06-12 20:02:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:25,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:25,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068429587] [2021-06-12 20:02:25,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068429587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719938833] [2021-06-12 20:02:25,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:25,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:02:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:25,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:25,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:25,652 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:25,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:25,656 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:25,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:25,662 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:25,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:25,665 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:25,694 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:02:25,694 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:25,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:25,695 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:02:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:25,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719938833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:25,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:25,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:25,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331363766] [2021-06-12 20:02:25,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:25,725 INFO L87 Difference]: Start difference. First operand 2242 states and 6387 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:26,052 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 29 [2021-06-12 20:02:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:26,231 INFO L93 Difference]: Finished difference Result 2274 states and 6431 transitions. [2021-06-12 20:02:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:26,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:26,234 INFO L225 Difference]: With dead ends: 2274 [2021-06-12 20:02:26,235 INFO L226 Difference]: Without dead ends: 2266 [2021-06-12 20:02:26,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 495.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-06-12 20:02:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 2226. [2021-06-12 20:02:26,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.8503370786516853) internal successors, (6342), 2225 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 6342 transitions. [2021-06-12 20:02:26,276 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 6342 transitions. Word has length 19 [2021-06-12 20:02:26,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:26,276 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 6342 transitions. [2021-06-12 20:02:26,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 6342 transitions. [2021-06-12 20:02:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:26,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:26,279 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:26,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:26,492 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1629909414, now seen corresponding path program 520 times [2021-06-12 20:02:26,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:26,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286191488] [2021-06-12 20:02:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:26,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286191488] [2021-06-12 20:02:26,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286191488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841661711] [2021-06-12 20:02:26,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:26,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:26,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:26,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:26,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:26,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:26,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:26,785 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:26,817 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:26,818 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:26,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:26,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:26,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841661711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:26,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:26,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:26,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49893883] [2021-06-12 20:02:26,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:26,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:26,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:26,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:26,875 INFO L87 Difference]: Start difference. First operand 2226 states and 6342 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:27,368 INFO L93 Difference]: Finished difference Result 2457 states and 6799 transitions. [2021-06-12 20:02:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:02:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:27,371 INFO L225 Difference]: With dead ends: 2457 [2021-06-12 20:02:27,371 INFO L226 Difference]: Without dead ends: 2457 [2021-06-12 20:02:27,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-12 20:02:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2278. [2021-06-12 20:02:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 2.8563899868247695) internal successors, (6504), 2277 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 6504 transitions. [2021-06-12 20:02:27,396 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 6504 transitions. Word has length 19 [2021-06-12 20:02:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:27,396 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 6504 transitions. [2021-06-12 20:02:27,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 6504 transitions. [2021-06-12 20:02:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:27,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:27,398 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:27,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4109,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:27,599 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:27,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:27,599 INFO L82 PathProgramCache]: Analyzing trace with hash -828293186, now seen corresponding path program 521 times [2021-06-12 20:02:27,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:27,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280486808] [2021-06-12 20:02:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:27,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:27,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280486808] [2021-06-12 20:02:27,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280486808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:27,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658195308] [2021-06-12 20:02:27,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:27,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:02:27,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:27,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:27,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:27,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:27,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:27,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:27,901 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:27,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:27,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:27,936 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:27,936 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:27,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:27,937 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:28,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658195308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:28,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:28,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:28,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245923575] [2021-06-12 20:02:28,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:28,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:28,011 INFO L87 Difference]: Start difference. First operand 2278 states and 6504 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:28,875 INFO L93 Difference]: Finished difference Result 2478 states and 6869 transitions. [2021-06-12 20:02:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:02:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:28,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:28,878 INFO L225 Difference]: With dead ends: 2478 [2021-06-12 20:02:28,878 INFO L226 Difference]: Without dead ends: 2470 [2021-06-12 20:02:28,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:02:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-12 20:02:28,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2290. [2021-06-12 20:02:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 2289 states have (on average 2.859327217125382) internal successors, (6545), 2289 states have internal predecessors, (6545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 6545 transitions. [2021-06-12 20:02:28,905 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 6545 transitions. Word has length 19 [2021-06-12 20:02:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:28,905 INFO L482 AbstractCegarLoop]: Abstraction has 2290 states and 6545 transitions. [2021-06-12 20:02:28,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 6545 transitions. [2021-06-12 20:02:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:28,907 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:28,907 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:29,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4113,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:29,117 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:29,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:29,117 INFO L82 PathProgramCache]: Analyzing trace with hash 890050520, now seen corresponding path program 522 times [2021-06-12 20:02:29,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:29,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642195551] [2021-06-12 20:02:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:29,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642195551] [2021-06-12 20:02:29,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642195551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650317702] [2021-06-12 20:02:29,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:29,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:02:29,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:29,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:29,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:29,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:29,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:29,496 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:29,499 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:29,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:29,502 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:29,534 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:29,535 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:29,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:29,535 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:29,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650317702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:29,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:29,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:29,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274703079] [2021-06-12 20:02:29,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:29,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:29,587 INFO L87 Difference]: Start difference. First operand 2290 states and 6545 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:30,170 INFO L93 Difference]: Finished difference Result 2446 states and 6828 transitions. [2021-06-12 20:02:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:02:30,170 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:30,173 INFO L225 Difference]: With dead ends: 2446 [2021-06-12 20:02:30,173 INFO L226 Difference]: Without dead ends: 2446 [2021-06-12 20:02:30,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 543.4ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-12 20:02:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2280. [2021-06-12 20:02:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 2.8547608600263272) internal successors, (6506), 2279 states have internal predecessors, (6506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 6506 transitions. [2021-06-12 20:02:30,197 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 6506 transitions. Word has length 19 [2021-06-12 20:02:30,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:30,197 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 6506 transitions. [2021-06-12 20:02:30,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:30,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 6506 transitions. [2021-06-12 20:02:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:30,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:30,199 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:30,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4118,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:30,417 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash -820562788, now seen corresponding path program 523 times [2021-06-12 20:02:30,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:30,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445650853] [2021-06-12 20:02:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:30,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:30,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445650853] [2021-06-12 20:02:30,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445650853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:30,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537520281] [2021-06-12 20:02:30,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:30,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:30,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:30,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:30,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:30,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,777 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:30,777 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:30,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:30,778 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:30,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537520281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:30,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:30,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:30,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587192076] [2021-06-12 20:02:30,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:30,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:30,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:30,802 INFO L87 Difference]: Start difference. First operand 2280 states and 6506 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:31,386 INFO L93 Difference]: Finished difference Result 2473 states and 6877 transitions. [2021-06-12 20:02:31,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:02:31,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:31,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:31,389 INFO L225 Difference]: With dead ends: 2473 [2021-06-12 20:02:31,389 INFO L226 Difference]: Without dead ends: 2473 [2021-06-12 20:02:31,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 508.5ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:02:31,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-06-12 20:02:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2275. [2021-06-12 20:02:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.8535620052770447) internal successors, (6489), 2274 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6489 transitions. [2021-06-12 20:02:31,412 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6489 transitions. Word has length 19 [2021-06-12 20:02:31,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:31,412 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6489 transitions. [2021-06-12 20:02:31,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6489 transitions. [2021-06-12 20:02:31,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:31,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:31,414 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:31,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4122 [2021-06-12 20:02:31,614 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:31,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1984999512, now seen corresponding path program 524 times [2021-06-12 20:02:31,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:31,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565767229] [2021-06-12 20:02:31,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:31,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565767229] [2021-06-12 20:02:31,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565767229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695410790] [2021-06-12 20:02:31,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:31,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:31,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:31,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:31,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:31,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:31,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:31,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:31,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,962 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:31,962 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:31,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:31,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:31,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695410790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:31,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:31,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:31,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355173818] [2021-06-12 20:02:31,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:31,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:31,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:31,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:31,990 INFO L87 Difference]: Start difference. First operand 2275 states and 6489 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:32,322 INFO L93 Difference]: Finished difference Result 2428 states and 6783 transitions. [2021-06-12 20:02:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:02:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:32,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:32,325 INFO L225 Difference]: With dead ends: 2428 [2021-06-12 20:02:32,325 INFO L226 Difference]: Without dead ends: 2428 [2021-06-12 20:02:32,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-12 20:02:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2275. [2021-06-12 20:02:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.8535620052770447) internal successors, (6489), 2274 states have internal predecessors, (6489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6489 transitions. [2021-06-12 20:02:32,364 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6489 transitions. Word has length 19 [2021-06-12 20:02:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:32,364 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6489 transitions. [2021-06-12 20:02:32,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6489 transitions. [2021-06-12 20:02:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:32,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:32,366 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:32,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4125,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:32,566 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1246894460, now seen corresponding path program 525 times [2021-06-12 20:02:32,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:32,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218670465] [2021-06-12 20:02:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:32,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:32,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218670465] [2021-06-12 20:02:32,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218670465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598484078] [2021-06-12 20:02:32,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:32,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:32,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:32,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:32,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:32,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:32,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:32,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:32,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:32,897 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:32,897 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:32,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:32,898 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:32,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598484078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:32,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:32,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:32,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665443340] [2021-06-12 20:02:32,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:32,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:32,965 INFO L87 Difference]: Start difference. First operand 2275 states and 6489 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:33,408 INFO L93 Difference]: Finished difference Result 2340 states and 6592 transitions. [2021-06-12 20:02:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:02:33,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:33,411 INFO L225 Difference]: With dead ends: 2340 [2021-06-12 20:02:33,411 INFO L226 Difference]: Without dead ends: 2336 [2021-06-12 20:02:33,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-12 20:02:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2271. [2021-06-12 20:02:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 2.8515418502202645) internal successors, (6473), 2270 states have internal predecessors, (6473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 6473 transitions. [2021-06-12 20:02:33,437 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 6473 transitions. Word has length 19 [2021-06-12 20:02:33,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:33,437 INFO L482 AbstractCegarLoop]: Abstraction has 2271 states and 6473 transitions. [2021-06-12 20:02:33,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 6473 transitions. [2021-06-12 20:02:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:33,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:33,439 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:33,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4128,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:33,657 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1319025502, now seen corresponding path program 526 times [2021-06-12 20:02:33,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:33,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088807705] [2021-06-12 20:02:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:33,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:33,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088807705] [2021-06-12 20:02:33,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088807705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:33,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960418038] [2021-06-12 20:02:33,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:33,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:33,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:33,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:33,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:33,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:33,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:33,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:33,975 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:33,978 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:33,981 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:33,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:33,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:33,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:34,014 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:02:34,014 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:34,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:34,015 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:02:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:34,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960418038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:34,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:34,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945453365] [2021-06-12 20:02:34,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:34,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:34,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:34,042 INFO L87 Difference]: Start difference. First operand 2271 states and 6473 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:34,438 INFO L93 Difference]: Finished difference Result 2322 states and 6549 transitions. [2021-06-12 20:02:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:34,441 INFO L225 Difference]: With dead ends: 2322 [2021-06-12 20:02:34,441 INFO L226 Difference]: Without dead ends: 2314 [2021-06-12 20:02:34,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:02:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2021-06-12 20:02:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2269. [2021-06-12 20:02:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2268 states have (on average 2.8465608465608465) internal successors, (6456), 2268 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 6456 transitions. [2021-06-12 20:02:34,465 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 6456 transitions. Word has length 19 [2021-06-12 20:02:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:34,465 INFO L482 AbstractCegarLoop]: Abstraction has 2269 states and 6456 transitions. [2021-06-12 20:02:34,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 6456 transitions. [2021-06-12 20:02:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:34,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:34,467 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:34,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4134 [2021-06-12 20:02:34,684 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:34,684 INFO L82 PathProgramCache]: Analyzing trace with hash 741834300, now seen corresponding path program 527 times [2021-06-12 20:02:34,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:34,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908229263] [2021-06-12 20:02:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:34,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908229263] [2021-06-12 20:02:34,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908229263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:34,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350616629] [2021-06-12 20:02:34,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:34,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:34,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:35,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:35,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:35,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:35,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:35,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:35,030 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:35,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:35,033 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:35,062 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:02:35,063 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:35,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:35,064 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:02:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350616629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:35,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 20 [2021-06-12 20:02:35,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694607093] [2021-06-12 20:02:35,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:02:35,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:35,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:02:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:02:35,092 INFO L87 Difference]: Start difference. First operand 2269 states and 6456 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:35,541 INFO L93 Difference]: Finished difference Result 2304 states and 6506 transitions. [2021-06-12 20:02:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:35,544 INFO L225 Difference]: With dead ends: 2304 [2021-06-12 20:02:35,544 INFO L226 Difference]: Without dead ends: 2292 [2021-06-12 20:02:35,544 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:02:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-06-12 20:02:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2265. [2021-06-12 20:02:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 2.8445229681978796) internal successors, (6440), 2264 states have internal predecessors, (6440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 6440 transitions. [2021-06-12 20:02:35,568 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 6440 transitions. Word has length 19 [2021-06-12 20:02:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:35,568 INFO L482 AbstractCegarLoop]: Abstraction has 2265 states and 6440 transitions. [2021-06-12 20:02:35,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 6440 transitions. [2021-06-12 20:02:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:35,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:35,570 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:35,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4141 [2021-06-12 20:02:35,770 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1011819174, now seen corresponding path program 528 times [2021-06-12 20:02:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:35,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263662708] [2021-06-12 20:02:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:35,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263662708] [2021-06-12 20:02:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263662708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877854984] [2021-06-12 20:02:35,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:35,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:02:35,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:35,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:36,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:36,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:36,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:36,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:36,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:36,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:36,168 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:36,168 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:36,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:36,168 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:36,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877854984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:36,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:36,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:02:36,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033825145] [2021-06-12 20:02:36,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:02:36,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:36,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:02:36,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:36,228 INFO L87 Difference]: Start difference. First operand 2265 states and 6440 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:36,836 INFO L93 Difference]: Finished difference Result 2498 states and 6887 transitions. [2021-06-12 20:02:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:02:36,836 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:36,839 INFO L225 Difference]: With dead ends: 2498 [2021-06-12 20:02:36,839 INFO L226 Difference]: Without dead ends: 2498 [2021-06-12 20:02:36,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:02:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-06-12 20:02:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2300. [2021-06-12 20:02:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 2.854284471509352) internal successors, (6562), 2299 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 6562 transitions. [2021-06-12 20:02:36,866 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 6562 transitions. Word has length 19 [2021-06-12 20:02:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:36,866 INFO L482 AbstractCegarLoop]: Abstraction has 2300 states and 6562 transitions. [2021-06-12 20:02:36,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 6562 transitions. [2021-06-12 20:02:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:36,869 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:36,869 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:37,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4148,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:37,069 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:37,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:37,070 INFO L82 PathProgramCache]: Analyzing trace with hash -210202946, now seen corresponding path program 529 times [2021-06-12 20:02:37,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:37,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288255612] [2021-06-12 20:02:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:37,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:37,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288255612] [2021-06-12 20:02:37,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288255612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:37,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390038774] [2021-06-12 20:02:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:37,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:37,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:37,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:37,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:37,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:37,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:37,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:37,465 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:37,465 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:37,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:37,466 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:37,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390038774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:37,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:37,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:02:37,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763859814] [2021-06-12 20:02:37,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:02:37,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:37,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:02:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:37,546 INFO L87 Difference]: Start difference. First operand 2300 states and 6562 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:38,713 INFO L93 Difference]: Finished difference Result 2556 states and 7084 transitions. [2021-06-12 20:02:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:02:38,713 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:38,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:38,716 INFO L225 Difference]: With dead ends: 2556 [2021-06-12 20:02:38,716 INFO L226 Difference]: Without dead ends: 2546 [2021-06-12 20:02:38,716 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 921.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:02:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-12 20:02:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 2360. [2021-06-12 20:02:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 2.8660449342941923) internal successors, (6761), 2359 states have internal predecessors, (6761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 6761 transitions. [2021-06-12 20:02:38,742 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 6761 transitions. Word has length 19 [2021-06-12 20:02:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:38,742 INFO L482 AbstractCegarLoop]: Abstraction has 2360 states and 6761 transitions. [2021-06-12 20:02:38,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 6761 transitions. [2021-06-12 20:02:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:38,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:38,744 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:38,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4152,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:38,944 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:38,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:38,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1508140760, now seen corresponding path program 530 times [2021-06-12 20:02:38,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:38,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580162113] [2021-06-12 20:02:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:39,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:39,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580162113] [2021-06-12 20:02:39,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580162113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110861743] [2021-06-12 20:02:39,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:39,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:39,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:39,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:39,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:39,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:39,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:39,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:39,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:39,287 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:39,319 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:39,319 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:39,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:39,320 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:39,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110861743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:39,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:39,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:02:39,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394788369] [2021-06-12 20:02:39,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:02:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:02:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:39,373 INFO L87 Difference]: Start difference. First operand 2360 states and 6761 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:40,067 INFO L93 Difference]: Finished difference Result 2526 states and 7034 transitions. [2021-06-12 20:02:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:02:40,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:40,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:40,071 INFO L225 Difference]: With dead ends: 2526 [2021-06-12 20:02:40,071 INFO L226 Difference]: Without dead ends: 2526 [2021-06-12 20:02:40,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 593.5ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:02:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2526 states. [2021-06-12 20:02:40,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2526 to 2352. [2021-06-12 20:02:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2352 states, 2351 states have (on average 2.858358145470013) internal successors, (6720), 2351 states have internal predecessors, (6720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 6720 transitions. [2021-06-12 20:02:40,098 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 6720 transitions. Word has length 19 [2021-06-12 20:02:40,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:40,098 INFO L482 AbstractCegarLoop]: Abstraction has 2352 states and 6720 transitions. [2021-06-12 20:02:40,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:40,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 6720 transitions. [2021-06-12 20:02:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:40,100 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:40,101 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:40,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:40,317 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:40,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:40,317 INFO L82 PathProgramCache]: Analyzing trace with hash -202472548, now seen corresponding path program 531 times [2021-06-12 20:02:40,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:40,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044562741] [2021-06-12 20:02:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:40,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044562741] [2021-06-12 20:02:40,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044562741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218321463] [2021-06-12 20:02:40,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:40,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:40,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:40,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:40,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:40,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:40,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:40,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,736 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:40,736 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:40,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:40,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:40,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218321463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:40,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:40,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:02:40,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364502617] [2021-06-12 20:02:40,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:02:40,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:40,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:02:40,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:40,761 INFO L87 Difference]: Start difference. First operand 2352 states and 6720 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:41,613 INFO L93 Difference]: Finished difference Result 2641 states and 7272 transitions. [2021-06-12 20:02:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:02:41,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:41,616 INFO L225 Difference]: With dead ends: 2641 [2021-06-12 20:02:41,616 INFO L226 Difference]: Without dead ends: 2641 [2021-06-12 20:02:41,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:02:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-12 20:02:41,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2356. [2021-06-12 20:02:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 2.860297239915074) internal successors, (6736), 2355 states have internal predecessors, (6736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 6736 transitions. [2021-06-12 20:02:41,644 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 6736 transitions. Word has length 19 [2021-06-12 20:02:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:41,644 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 6736 transitions. [2021-06-12 20:02:41,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 6736 transitions. [2021-06-12 20:02:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:41,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:41,647 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:41,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4161 [2021-06-12 20:02:41,864 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1691877544, now seen corresponding path program 532 times [2021-06-12 20:02:41,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:41,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634596718] [2021-06-12 20:02:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:41,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:41,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634596718] [2021-06-12 20:02:41,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634596718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:41,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957918441] [2021-06-12 20:02:41,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:42,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:42,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:42,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:42,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:42,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:42,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:42,217 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,241 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:42,241 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:42,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:42,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:42,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957918441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:42,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:42,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:02:42,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539515833] [2021-06-12 20:02:42,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:02:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:02:42,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:42,267 INFO L87 Difference]: Start difference. First operand 2356 states and 6736 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:43,485 INFO L93 Difference]: Finished difference Result 2652 states and 7285 transitions. [2021-06-12 20:02:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:02:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:43,489 INFO L225 Difference]: With dead ends: 2652 [2021-06-12 20:02:43,489 INFO L226 Difference]: Without dead ends: 2652 [2021-06-12 20:02:43,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 986.8ms TimeCoverageRelationStatistics Valid=288, Invalid=2262, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:02:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-06-12 20:02:43,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 2337. [2021-06-12 20:02:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.855736301369863) internal successors, (6671), 2336 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6671 transitions. [2021-06-12 20:02:43,518 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6671 transitions. Word has length 19 [2021-06-12 20:02:43,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:43,518 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 6671 transitions. [2021-06-12 20:02:43,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:43,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6671 transitions. [2021-06-12 20:02:43,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:43,520 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:43,520 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:43,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4164 [2021-06-12 20:02:43,734 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:43,735 INFO L82 PathProgramCache]: Analyzing trace with hash -618792164, now seen corresponding path program 533 times [2021-06-12 20:02:43,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:43,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253758621] [2021-06-12 20:02:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:43,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:43,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253758621] [2021-06-12 20:02:43,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253758621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:43,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998720563] [2021-06-12 20:02:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:43,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:02:43,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:43,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:43,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:44,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:44,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:44,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,096 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:44,096 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:44,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:44,097 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:44,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998720563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:44,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-12 20:02:44,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992780674] [2021-06-12 20:02:44,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:02:44,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:44,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:02:44,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:44,121 INFO L87 Difference]: Start difference. First operand 2337 states and 6671 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:44,631 INFO L93 Difference]: Finished difference Result 2469 states and 6898 transitions. [2021-06-12 20:02:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:44,634 INFO L225 Difference]: With dead ends: 2469 [2021-06-12 20:02:44,634 INFO L226 Difference]: Without dead ends: 2469 [2021-06-12 20:02:44,634 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:02:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-12 20:02:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2337. [2021-06-12 20:02:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 2.855736301369863) internal successors, (6671), 2336 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 6671 transitions. [2021-06-12 20:02:44,658 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 6671 transitions. Word has length 19 [2021-06-12 20:02:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:44,658 INFO L482 AbstractCegarLoop]: Abstraction has 2337 states and 6671 transitions. [2021-06-12 20:02:44,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 6671 transitions. [2021-06-12 20:02:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:44,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:44,660 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:44,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4167 [2021-06-12 20:02:44,869 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1288759676, now seen corresponding path program 534 times [2021-06-12 20:02:44,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:44,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896436222] [2021-06-12 20:02:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:44,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896436222] [2021-06-12 20:02:44,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896436222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:44,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41266311] [2021-06-12 20:02:44,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:44,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:02:44,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:44,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:44,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:45,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:45,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:45,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:45,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:45,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:45,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:45,211 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:45,211 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:45,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:45,212 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:45,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41266311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:45,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:45,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:45,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145133751] [2021-06-12 20:02:45,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:45,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:45,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:45,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:45,279 INFO L87 Difference]: Start difference. First operand 2337 states and 6671 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:45,755 INFO L93 Difference]: Finished difference Result 2411 states and 6789 transitions. [2021-06-12 20:02:45,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:45,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:45,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:45,758 INFO L225 Difference]: With dead ends: 2411 [2021-06-12 20:02:45,758 INFO L226 Difference]: Without dead ends: 2407 [2021-06-12 20:02:45,759 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 491.4ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:45,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-12 20:02:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2331. [2021-06-12 20:02:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.853648068669528) internal successors, (6649), 2330 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6649 transitions. [2021-06-12 20:02:45,787 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6649 transitions. Word has length 19 [2021-06-12 20:02:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:45,787 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6649 transitions. [2021-06-12 20:02:45,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6649 transitions. [2021-06-12 20:02:45,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:45,790 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:45,790 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:46,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:46,007 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:46,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:46,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1277160286, now seen corresponding path program 535 times [2021-06-12 20:02:46,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:46,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542820275] [2021-06-12 20:02:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:46,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:46,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542820275] [2021-06-12 20:02:46,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542820275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489389518] [2021-06-12 20:02:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:46,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:46,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:46,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:46,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:46,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:46,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:46,366 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:46,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:46,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:46,399 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:02:46,399 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:46,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:46,400 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:02:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:46,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489389518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:46,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:46,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395818014] [2021-06-12 20:02:46,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:46,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:46,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:46,428 INFO L87 Difference]: Start difference. First operand 2331 states and 6649 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:46,913 INFO L93 Difference]: Finished difference Result 2382 states and 6723 transitions. [2021-06-12 20:02:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:02:46,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:46,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:46,916 INFO L225 Difference]: With dead ends: 2382 [2021-06-12 20:02:46,916 INFO L226 Difference]: Without dead ends: 2374 [2021-06-12 20:02:46,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:46,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2374 states. [2021-06-12 20:02:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2374 to 2328. [2021-06-12 20:02:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.84959174903309) internal successors, (6631), 2327 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6631 transitions. [2021-06-12 20:02:46,940 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6631 transitions. Word has length 19 [2021-06-12 20:02:46,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:46,940 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6631 transitions. [2021-06-12 20:02:46,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6631 transitions. [2021-06-12 20:02:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:46,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:46,942 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:47,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4176,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:47,145 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash 783699516, now seen corresponding path program 536 times [2021-06-12 20:02:47,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:47,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085883387] [2021-06-12 20:02:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:47,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085883387] [2021-06-12 20:02:47,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085883387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:47,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411041815] [2021-06-12 20:02:47,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:47,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:47,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:47,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:47,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:47,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:47,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:47,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:47,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:47,499 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:47,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:47,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:47,531 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:02:47,531 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:47,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:47,532 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:02:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:47,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411041815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:47,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:47,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:47,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177599596] [2021-06-12 20:02:47,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:47,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:47,560 INFO L87 Difference]: Start difference. First operand 2328 states and 6631 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:48,053 INFO L93 Difference]: Finished difference Result 2381 states and 6708 transitions. [2021-06-12 20:02:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:02:48,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:48,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:48,056 INFO L225 Difference]: With dead ends: 2381 [2021-06-12 20:02:48,057 INFO L226 Difference]: Without dead ends: 2369 [2021-06-12 20:02:48,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:48,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-12 20:02:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2328. [2021-06-12 20:02:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.842286205414697) internal successors, (6614), 2327 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6614 transitions. [2021-06-12 20:02:48,083 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6614 transitions. Word has length 19 [2021-06-12 20:02:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:48,083 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6614 transitions. [2021-06-12 20:02:48,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6614 transitions. [2021-06-12 20:02:48,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:48,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:48,085 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:48,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4183 [2021-06-12 20:02:48,302 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:48,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:48,302 INFO L82 PathProgramCache]: Analyzing trace with hash 245843938, now seen corresponding path program 537 times [2021-06-12 20:02:48,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:48,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428720064] [2021-06-12 20:02:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:02:48,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:48,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428720064] [2021-06-12 20:02:48,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428720064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889182332] [2021-06-12 20:02:48,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:48,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:02:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:48,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:48,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:48,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:48,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:48,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:02:48,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:02:48,756 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:48,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:48,792 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:02:48,792 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:48,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:02:48,793 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:02:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:48,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889182332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:48,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:48,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-06-12 20:02:48,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554877366] [2021-06-12 20:02:48,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:02:48,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:48,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:02:48,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:02:48,824 INFO L87 Difference]: Start difference. First operand 2328 states and 6614 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:49,311 INFO L93 Difference]: Finished difference Result 2369 states and 6671 transitions. [2021-06-12 20:02:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:02:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:49,314 INFO L225 Difference]: With dead ends: 2369 [2021-06-12 20:02:49,314 INFO L226 Difference]: Without dead ends: 2353 [2021-06-12 20:02:49,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 473.7ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:02:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-12 20:02:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2328. [2021-06-12 20:02:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.839278040395359) internal successors, (6607), 2327 states have internal predecessors, (6607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6607 transitions. [2021-06-12 20:02:49,339 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6607 transitions. Word has length 19 [2021-06-12 20:02:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:49,340 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6607 transitions. [2021-06-12 20:02:49,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6607 transitions. [2021-06-12 20:02:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:49,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:49,342 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:49,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4190,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:49,558 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash 969109082, now seen corresponding path program 538 times [2021-06-12 20:02:49,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:49,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406909317] [2021-06-12 20:02:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:49,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:49,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406909317] [2021-06-12 20:02:49,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406909317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:49,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164454522] [2021-06-12 20:02:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:49,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:02:49,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:49,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:49,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:49,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:49,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:49,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:49,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:49,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:49,972 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:49,973 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:49,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:49,973 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:50,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164454522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:50,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:50,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790643557] [2021-06-12 20:02:50,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:50,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:50,032 INFO L87 Difference]: Start difference. First operand 2328 states and 6607 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:50,461 INFO L93 Difference]: Finished difference Result 2501 states and 6942 transitions. [2021-06-12 20:02:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:02:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:50,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:50,464 INFO L225 Difference]: With dead ends: 2501 [2021-06-12 20:02:50,464 INFO L226 Difference]: Without dead ends: 2501 [2021-06-12 20:02:50,464 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 456.3ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:02:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2021-06-12 20:02:50,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2355. [2021-06-12 20:02:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 2.846644010195412) internal successors, (6701), 2354 states have internal predecessors, (6701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 6701 transitions. [2021-06-12 20:02:50,509 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 6701 transitions. Word has length 19 [2021-06-12 20:02:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:50,509 INFO L482 AbstractCegarLoop]: Abstraction has 2355 states and 6701 transitions. [2021-06-12 20:02:50,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 6701 transitions. [2021-06-12 20:02:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:50,511 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:50,511 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:50,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4197 [2021-06-12 20:02:50,727 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1770725310, now seen corresponding path program 539 times [2021-06-12 20:02:50,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:50,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057047925] [2021-06-12 20:02:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:50,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:50,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057047925] [2021-06-12 20:02:50,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057047925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:50,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127823917] [2021-06-12 20:02:50,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:50,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:02:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:50,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:51,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:51,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:51,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:51,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:51,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:51,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:51,153 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:51,153 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:51,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:51,154 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:51,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127823917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:51,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:51,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:51,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690516709] [2021-06-12 20:02:51,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:51,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:51,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:51,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:51,229 INFO L87 Difference]: Start difference. First operand 2355 states and 6701 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:52,286 INFO L93 Difference]: Finished difference Result 2540 states and 7010 transitions. [2021-06-12 20:02:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:02:52,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:52,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:52,289 INFO L225 Difference]: With dead ends: 2540 [2021-06-12 20:02:52,289 INFO L226 Difference]: Without dead ends: 2528 [2021-06-12 20:02:52,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1001.4ms TimeCoverageRelationStatistics Valid=230, Invalid=2026, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:02:52,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-12 20:02:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 2365. [2021-06-12 20:02:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 2.8468697123519457) internal successors, (6730), 2364 states have internal predecessors, (6730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 6730 transitions. [2021-06-12 20:02:52,327 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 6730 transitions. Word has length 19 [2021-06-12 20:02:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:52,327 INFO L482 AbstractCegarLoop]: Abstraction has 2365 states and 6730 transitions. [2021-06-12 20:02:52,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 6730 transitions. [2021-06-12 20:02:52,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:52,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:52,329 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:52,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:52,529 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash -805898280, now seen corresponding path program 540 times [2021-06-12 20:02:52,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:52,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569980496] [2021-06-12 20:02:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:52,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:52,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569980496] [2021-06-12 20:02:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569980496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310933757] [2021-06-12 20:02:52,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:52,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:02:52,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:52,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:02:52,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:52,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:52,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:52,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:52,854 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:52,886 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:02:52,886 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:52,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:02:52,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:02:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:52,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310933757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:52,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:52,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:52,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566242910] [2021-06-12 20:02:52,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:52,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:52,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:52,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:52,946 INFO L87 Difference]: Start difference. First operand 2365 states and 6730 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:53,599 INFO L93 Difference]: Finished difference Result 2512 states and 6967 transitions. [2021-06-12 20:02:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:02:53,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:53,602 INFO L225 Difference]: With dead ends: 2512 [2021-06-12 20:02:53,602 INFO L226 Difference]: Without dead ends: 2512 [2021-06-12 20:02:53,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 702.0ms TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:02:53,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2512 states. [2021-06-12 20:02:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2512 to 2364. [2021-06-12 20:02:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 2.8404570461278036) internal successors, (6712), 2363 states have internal predecessors, (6712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 6712 transitions. [2021-06-12 20:02:53,626 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 6712 transitions. Word has length 19 [2021-06-12 20:02:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:53,626 INFO L482 AbstractCegarLoop]: Abstraction has 2364 states and 6712 transitions. [2021-06-12 20:02:53,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:53,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 6712 transitions. [2021-06-12 20:02:53,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:53,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:53,628 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:53,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4206 [2021-06-12 20:02:53,829 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1778455708, now seen corresponding path program 541 times [2021-06-12 20:02:53,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:53,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112040366] [2021-06-12 20:02:53,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:53,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:53,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112040366] [2021-06-12 20:02:53,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112040366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:53,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353807026] [2021-06-12 20:02:53,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:53,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:53,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:54,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:54,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:54,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:54,173 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,195 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:54,195 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:54,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:54,195 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:54,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353807026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:54,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:54,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:54,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366873355] [2021-06-12 20:02:54,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:54,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:54,228 INFO L87 Difference]: Start difference. First operand 2364 states and 6712 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:55,259 INFO L93 Difference]: Finished difference Result 2649 states and 7227 transitions. [2021-06-12 20:02:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:02:55,260 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:55,262 INFO L225 Difference]: With dead ends: 2649 [2021-06-12 20:02:55,262 INFO L226 Difference]: Without dead ends: 2649 [2021-06-12 20:02:55,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=246, Invalid=2204, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:02:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2649 states. [2021-06-12 20:02:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2649 to 2368. [2021-06-12 20:02:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.841571609632446) internal successors, (6726), 2367 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6726 transitions. [2021-06-12 20:02:55,286 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6726 transitions. Word has length 19 [2021-06-12 20:02:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:55,286 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6726 transitions. [2021-06-12 20:02:55,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6726 transitions. [2021-06-12 20:02:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:55,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:55,288 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:55,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4210 [2021-06-12 20:02:55,488 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:55,489 INFO L82 PathProgramCache]: Analyzing trace with hash 289050712, now seen corresponding path program 542 times [2021-06-12 20:02:55,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:55,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160525419] [2021-06-12 20:02:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:55,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160525419] [2021-06-12 20:02:55,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160525419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306548916] [2021-06-12 20:02:55,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:55,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:02:55,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:55,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:55,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:55,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:55,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,848 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:55,848 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:55,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:55,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:55,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306548916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:55,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:55,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:55,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475930531] [2021-06-12 20:02:55,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:55,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:55,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:55,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:55,873 INFO L87 Difference]: Start difference. First operand 2368 states and 6726 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:02:57,704 INFO L93 Difference]: Finished difference Result 2832 states and 7583 transitions. [2021-06-12 20:02:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:02:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:02:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:02:57,707 INFO L225 Difference]: With dead ends: 2832 [2021-06-12 20:02:57,708 INFO L226 Difference]: Without dead ends: 2832 [2021-06-12 20:02:57,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 1405.3ms TimeCoverageRelationStatistics Valid=486, Invalid=4770, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 20:02:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-12 20:02:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2369. [2021-06-12 20:02:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 2.845439189189189) internal successors, (6738), 2368 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 6738 transitions. [2021-06-12 20:02:57,741 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 6738 transitions. Word has length 19 [2021-06-12 20:02:57,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:02:57,741 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 6738 transitions. [2021-06-12 20:02:57,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:02:57,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 6738 transitions. [2021-06-12 20:02:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:02:57,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:02:57,743 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:02:57,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4213,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:57,944 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:02:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:02:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1362136092, now seen corresponding path program 543 times [2021-06-12 20:02:57,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:02:57,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180916728] [2021-06-12 20:02:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:02:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:02:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:58,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:02:58,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180916728] [2021-06-12 20:02:58,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180916728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118673740] [2021-06-12 20:02:58,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:02:58,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:02:58,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:02:58,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:02:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:02:58,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:02:58,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:02:58,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:02:58,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,332 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:02:58,333 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:02:58,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:02:58,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:02:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:02:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118673740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:02:58,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:02:58,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:02:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185916216] [2021-06-12 20:02:58,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:02:58,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:02:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:02:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:02:58,358 INFO L87 Difference]: Start difference. First operand 2369 states and 6738 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:01,138 INFO L93 Difference]: Finished difference Result 2708 states and 7362 transitions. [2021-06-12 20:03:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 20:03:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:01,141 INFO L225 Difference]: With dead ends: 2708 [2021-06-12 20:03:01,141 INFO L226 Difference]: Without dead ends: 2708 [2021-06-12 20:03:01,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 2190.2ms TimeCoverageRelationStatistics Valid=764, Invalid=7068, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 20:03:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-06-12 20:03:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2346. [2021-06-12 20:03:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-06-12 20:03:01,166 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-06-12 20:03:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:01,166 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-06-12 20:03:01,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-06-12 20:03:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:01,168 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:01,168 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:01,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4216,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:01,381 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash 268044504, now seen corresponding path program 544 times [2021-06-12 20:03:01,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:01,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744064834] [2021-06-12 20:03:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:01,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:01,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744064834] [2021-06-12 20:03:01,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744064834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:01,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853714779] [2021-06-12 20:03:01,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:01,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:01,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:01,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:01,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:01,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:01,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:01,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,797 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:01,797 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:01,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:01,798 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:01,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853714779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:01,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:01,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-12 20:03:01,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003789094] [2021-06-12 20:03:01,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:03:01,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:01,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:03:01,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:01,827 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:02,199 INFO L93 Difference]: Finished difference Result 2415 states and 6777 transitions. [2021-06-12 20:03:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:03:02,199 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:02,201 INFO L225 Difference]: With dead ends: 2415 [2021-06-12 20:03:02,201 INFO L226 Difference]: Without dead ends: 2415 [2021-06-12 20:03:02,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-12 20:03:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2346. [2021-06-12 20:03:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-06-12 20:03:02,231 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-06-12 20:03:02,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:02,231 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-06-12 20:03:02,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:02,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-06-12 20:03:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:02,233 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:02,233 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:02,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4219,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:02,450 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:02,450 INFO L82 PathProgramCache]: Analyzing trace with hash -843621406, now seen corresponding path program 545 times [2021-06-12 20:03:02,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:02,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391462586] [2021-06-12 20:03:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:02,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:02,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391462586] [2021-06-12 20:03:02,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391462586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335947995] [2021-06-12 20:03:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:02,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:02,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:02,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:02,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:02,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:02,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:02,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:02,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,745 INFO L628 ElimStorePlain]: treesize reduction 27, result has 30.8 percent of original size [2021-06-12 20:03:02,745 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:02,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:02,746 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:53, output treesize:12 [2021-06-12 20:03:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:02,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335947995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:02,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:02,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 20:03:02,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679824239] [2021-06-12 20:03:02,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:03:02,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:03:02,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:02,771 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:03,032 INFO L93 Difference]: Finished difference Result 3276 states and 9050 transitions. [2021-06-12 20:03:03,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:03,036 INFO L225 Difference]: With dead ends: 3276 [2021-06-12 20:03:03,036 INFO L226 Difference]: Without dead ends: 3276 [2021-06-12 20:03:03,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-12 20:03:03,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2345. [2021-06-12 20:03:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.839590443686007) internal successors, (6656), 2344 states have internal predecessors, (6656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 6656 transitions. [2021-06-12 20:03:03,066 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 6656 transitions. Word has length 19 [2021-06-12 20:03:03,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:03,066 INFO L482 AbstractCegarLoop]: Abstraction has 2345 states and 6656 transitions. [2021-06-12 20:03:03,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 6656 transitions. [2021-06-12 20:03:03,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:03,069 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:03,069 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:03,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4222 [2021-06-12 20:03:03,277 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash -712743494, now seen corresponding path program 546 times [2021-06-12 20:03:03,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:03,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879776596] [2021-06-12 20:03:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:03,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:03,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:03,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879776596] [2021-06-12 20:03:03,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879776596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099517329] [2021-06-12 20:03:03,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:03,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:03,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:03,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:03,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:03,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:03,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:03,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:03,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:03,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:03,579 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:03,582 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-12 20:03:03,584 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:03,605 INFO L628 ElimStorePlain]: treesize reduction 26, result has 43.5 percent of original size [2021-06-12 20:03:03,605 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:03,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:03,606 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:107, output treesize:20 [2021-06-12 20:03:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:03,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099517329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:03,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:03,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 20:03:03,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83309002] [2021-06-12 20:03:03,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:03:03,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:03,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:03:03,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:03:03,635 INFO L87 Difference]: Start difference. First operand 2345 states and 6656 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:04,174 INFO L93 Difference]: Finished difference Result 3271 states and 9034 transitions. [2021-06-12 20:03:04,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:03:04,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:04,177 INFO L225 Difference]: With dead ends: 3271 [2021-06-12 20:03:04,177 INFO L226 Difference]: Without dead ends: 3265 [2021-06-12 20:03:04,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:03:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3265 states. [2021-06-12 20:03:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3265 to 2345. [2021-06-12 20:03:04,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2345 states, 2344 states have (on average 2.839163822525597) internal successors, (6655), 2344 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2345 states to 2345 states and 6655 transitions. [2021-06-12 20:03:04,205 INFO L78 Accepts]: Start accepts. Automaton has 2345 states and 6655 transitions. Word has length 19 [2021-06-12 20:03:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:04,205 INFO L482 AbstractCegarLoop]: Abstraction has 2345 states and 6655 transitions. [2021-06-12 20:03:04,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2345 states and 6655 transitions. [2021-06-12 20:03:04,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:04,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:04,207 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:04,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4224,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:04,413 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:04,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash -545568448, now seen corresponding path program 547 times [2021-06-12 20:03:04,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:04,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675946342] [2021-06-12 20:03:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:04,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:04,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675946342] [2021-06-12 20:03:04,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675946342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709830217] [2021-06-12 20:03:04,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:04,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:04,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:04,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:04,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:04,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,785 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:04,785 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:04,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:04,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:04,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709830217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:04,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:04,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:04,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301736875] [2021-06-12 20:03:04,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:04,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:04,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:04,812 INFO L87 Difference]: Start difference. First operand 2345 states and 6655 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:05,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:05,121 INFO L93 Difference]: Finished difference Result 3277 states and 9052 transitions. [2021-06-12 20:03:05,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:03:05,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:05,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:05,124 INFO L225 Difference]: With dead ends: 3277 [2021-06-12 20:03:05,124 INFO L226 Difference]: Without dead ends: 3277 [2021-06-12 20:03:05,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3277 states. [2021-06-12 20:03:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3277 to 2346. [2021-06-12 20:03:05,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.839232409381663) internal successors, (6658), 2345 states have internal predecessors, (6658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6658 transitions. [2021-06-12 20:03:05,150 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6658 transitions. Word has length 19 [2021-06-12 20:03:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:05,150 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6658 transitions. [2021-06-12 20:03:05,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6658 transitions. [2021-06-12 20:03:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:05,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:05,152 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:05,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4231 [2021-06-12 20:03:05,367 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:05,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:05,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1752979292, now seen corresponding path program 548 times [2021-06-12 20:03:05,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:05,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895634727] [2021-06-12 20:03:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:05,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895634727] [2021-06-12 20:03:05,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895634727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:05,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101019812] [2021-06-12 20:03:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:05,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:05,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:05,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:05,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:05,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:05,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:05,778 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:05,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:05,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:05,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:05,789 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:05,791 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:05,821 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:05,821 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:05,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:05,822 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101019812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:05,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:05,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:05,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711334462] [2021-06-12 20:03:05,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:05,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:05,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:05,855 INFO L87 Difference]: Start difference. First operand 2346 states and 6658 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:06,480 INFO L93 Difference]: Finished difference Result 3273 states and 9038 transitions. [2021-06-12 20:03:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:06,480 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:06,483 INFO L225 Difference]: With dead ends: 3273 [2021-06-12 20:03:06,483 INFO L226 Difference]: Without dead ends: 3268 [2021-06-12 20:03:06,484 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 655.1ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3268 states. [2021-06-12 20:03:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3268 to 2346. [2021-06-12 20:03:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2346 states, 2345 states have (on average 2.8388059701492536) internal successors, (6657), 2345 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:06,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2346 states to 2346 states and 6657 transitions. [2021-06-12 20:03:06,514 INFO L78 Accepts]: Start accepts. Automaton has 2346 states and 6657 transitions. Word has length 19 [2021-06-12 20:03:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:06,514 INFO L482 AbstractCegarLoop]: Abstraction has 2346 states and 6657 transitions. [2021-06-12 20:03:06,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:06,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2346 states and 6657 transitions. [2021-06-12 20:03:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:06,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:06,516 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:06,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:06,733 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2117451682, now seen corresponding path program 549 times [2021-06-12 20:03:06,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:06,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627344702] [2021-06-12 20:03:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:06,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:06,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627344702] [2021-06-12 20:03:06,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627344702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:06,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949361952] [2021-06-12 20:03:06,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:06,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:06,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:06,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:06,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:07,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:07,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:07,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:07,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,098 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:07,098 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:07,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:07,099 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:07,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949361952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:07,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:07,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:07,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513442048] [2021-06-12 20:03:07,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:07,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:07,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:07,124 INFO L87 Difference]: Start difference. First operand 2346 states and 6657 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:08,008 INFO L93 Difference]: Finished difference Result 3314 states and 9126 transitions. [2021-06-12 20:03:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:03:08,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:08,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:08,011 INFO L225 Difference]: With dead ends: 3314 [2021-06-12 20:03:08,011 INFO L226 Difference]: Without dead ends: 3314 [2021-06-12 20:03:08,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 746.3ms TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:03:08,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2021-06-12 20:03:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2349. [2021-06-12 20:03:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 2.8390119250425894) internal successors, (6666), 2348 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 6666 transitions. [2021-06-12 20:03:08,038 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 6666 transitions. Word has length 19 [2021-06-12 20:03:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:08,038 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 6666 transitions. [2021-06-12 20:03:08,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 6666 transitions. [2021-06-12 20:03:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:08,040 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:08,040 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:08,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4241 [2021-06-12 20:03:08,240 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:08,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:08,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1246633026, now seen corresponding path program 550 times [2021-06-12 20:03:08,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:08,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735588384] [2021-06-12 20:03:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:08,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735588384] [2021-06-12 20:03:08,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735588384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900193520] [2021-06-12 20:03:08,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:08,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:08,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:08,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:08,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:08,623 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:08,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:08,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:08,630 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:08,633 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:08,636 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:08,665 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:08,665 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:08,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:08,666 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:08,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900193520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:08,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:08,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:08,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286863285] [2021-06-12 20:03:08,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:08,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:08,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:08,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:08,697 INFO L87 Difference]: Start difference. First operand 2349 states and 6666 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:09,365 INFO L93 Difference]: Finished difference Result 3283 states and 9057 transitions. [2021-06-12 20:03:09,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:03:09,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:09,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:09,369 INFO L225 Difference]: With dead ends: 3283 [2021-06-12 20:03:09,369 INFO L226 Difference]: Without dead ends: 3279 [2021-06-12 20:03:09,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:03:09,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-06-12 20:03:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2351. [2021-06-12 20:03:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.8387234042553193) internal successors, (6671), 2350 states have internal predecessors, (6671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 6671 transitions. [2021-06-12 20:03:09,399 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 6671 transitions. Word has length 19 [2021-06-12 20:03:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:09,399 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 6671 transitions. [2021-06-12 20:03:09,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 6671 transitions. [2021-06-12 20:03:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:09,401 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:09,401 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:09,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-06-12 20:03:09,617 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:09,617 INFO L82 PathProgramCache]: Analyzing trace with hash 956429568, now seen corresponding path program 551 times [2021-06-12 20:03:09,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:09,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228286681] [2021-06-12 20:03:09,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:09,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:09,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228286681] [2021-06-12 20:03:09,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228286681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:09,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428040314] [2021-06-12 20:03:09,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:09,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:09,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:09,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:09,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:09,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:09,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,008 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:10,008 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:10,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:10,009 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428040314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:10,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:10,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855277342] [2021-06-12 20:03:10,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:10,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:10,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:10,033 INFO L87 Difference]: Start difference. First operand 2351 states and 6671 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:11,626 INFO L93 Difference]: Finished difference Result 3492 states and 9443 transitions. [2021-06-12 20:03:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:03:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:11,629 INFO L225 Difference]: With dead ends: 3492 [2021-06-12 20:03:11,629 INFO L226 Difference]: Without dead ends: 3492 [2021-06-12 20:03:11,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1303.3ms TimeCoverageRelationStatistics Valid=400, Invalid=3382, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:03:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2021-06-12 20:03:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 2372. [2021-06-12 20:03:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 2.844369464361029) internal successors, (6744), 2371 states have internal predecessors, (6744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6744 transitions. [2021-06-12 20:03:11,655 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6744 transitions. Word has length 19 [2021-06-12 20:03:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:11,655 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 6744 transitions. [2021-06-12 20:03:11,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6744 transitions. [2021-06-12 20:03:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:11,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:11,658 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:11,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4251 [2021-06-12 20:03:11,858 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:11,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:11,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1784488604, now seen corresponding path program 552 times [2021-06-12 20:03:11,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:11,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040991739] [2021-06-12 20:03:11,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:11,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:11,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040991739] [2021-06-12 20:03:11,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040991739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:11,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046111036] [2021-06-12 20:03:11,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:11,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:12,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:12,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:12,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:12,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:12,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:12,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:12,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:12,208 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:12,241 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:12,241 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:12,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:12,242 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:12,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046111036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:12,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:12,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:12,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666055337] [2021-06-12 20:03:12,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:12,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:12,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:12,277 INFO L87 Difference]: Start difference. First operand 2372 states and 6744 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:12,854 INFO L93 Difference]: Finished difference Result 3307 states and 9136 transitions. [2021-06-12 20:03:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:03:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:12,857 INFO L225 Difference]: With dead ends: 3307 [2021-06-12 20:03:12,857 INFO L226 Difference]: Without dead ends: 3304 [2021-06-12 20:03:12,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:03:12,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3304 states. [2021-06-12 20:03:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3304 to 2374. [2021-06-12 20:03:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 2373 states have (on average 2.8440792246101982) internal successors, (6749), 2373 states have internal predecessors, (6749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 6749 transitions. [2021-06-12 20:03:12,883 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 6749 transitions. Word has length 19 [2021-06-12 20:03:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:12,883 INFO L482 AbstractCegarLoop]: Abstraction has 2374 states and 6749 transitions. [2021-06-12 20:03:12,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 6749 transitions. [2021-06-12 20:03:12,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:12,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:12,886 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:13,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4254,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:13,086 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1196071906, now seen corresponding path program 553 times [2021-06-12 20:03:13,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:13,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248758679] [2021-06-12 20:03:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:13,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248758679] [2021-06-12 20:03:13,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248758679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613135401] [2021-06-12 20:03:13,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:13,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:13,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:13,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:13,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:13,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,422 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:13,422 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:13,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:13,423 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613135401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:13,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:13,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:13,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512154426] [2021-06-12 20:03:13,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:13,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:13,445 INFO L87 Difference]: Start difference. First operand 2374 states and 6749 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:14,324 INFO L93 Difference]: Finished difference Result 3443 states and 9382 transitions. [2021-06-12 20:03:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:03:14,324 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:14,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:14,328 INFO L225 Difference]: With dead ends: 3443 [2021-06-12 20:03:14,328 INFO L226 Difference]: Without dead ends: 3443 [2021-06-12 20:03:14,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=192, Invalid=1530, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:03:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2021-06-12 20:03:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 2389. [2021-06-12 20:03:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8479899497487438) internal successors, (6801), 2388 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6801 transitions. [2021-06-12 20:03:14,359 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6801 transitions. Word has length 19 [2021-06-12 20:03:14,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:14,359 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 6801 transitions. [2021-06-12 20:03:14,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6801 transitions. [2021-06-12 20:03:14,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:14,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:14,361 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:14,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4261 [2021-06-12 20:03:14,577 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:14,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:14,578 INFO L82 PathProgramCache]: Analyzing trace with hash 276371198, now seen corresponding path program 554 times [2021-06-12 20:03:14,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:14,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070506002] [2021-06-12 20:03:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:14,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:14,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070506002] [2021-06-12 20:03:14,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070506002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:14,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355819778] [2021-06-12 20:03:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:14,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:14,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:14,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:14,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:14,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:14,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:14,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:14,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:14,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:14,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:14,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:14,975 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:14,977 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:14,980 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:15,009 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:15,009 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:15,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:15,010 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:15,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355819778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:15,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:15,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:15,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149830856] [2021-06-12 20:03:15,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:15,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:15,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:15,040 INFO L87 Difference]: Start difference. First operand 2389 states and 6801 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:15,658 INFO L93 Difference]: Finished difference Result 3324 states and 9193 transitions. [2021-06-12 20:03:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:03:15,658 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:15,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:15,662 INFO L225 Difference]: With dead ends: 3324 [2021-06-12 20:03:15,662 INFO L226 Difference]: Without dead ends: 3322 [2021-06-12 20:03:15,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:03:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3322 states. [2021-06-12 20:03:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3322 to 2391. [2021-06-12 20:03:15,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2390 states have (on average 2.8476987447698745) internal successors, (6806), 2390 states have internal predecessors, (6806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 6806 transitions. [2021-06-12 20:03:15,688 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 6806 transitions. Word has length 19 [2021-06-12 20:03:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:15,688 INFO L482 AbstractCegarLoop]: Abstraction has 2391 states and 6806 transitions. [2021-06-12 20:03:15,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 6806 transitions. [2021-06-12 20:03:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:15,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:15,691 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:15,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4264 [2021-06-12 20:03:15,891 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:15,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:15,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1203802304, now seen corresponding path program 555 times [2021-06-12 20:03:15,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:15,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057432885] [2021-06-12 20:03:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:16,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057432885] [2021-06-12 20:03:16,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057432885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:16,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814252979] [2021-06-12 20:03:16,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:16,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:03:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:16,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:16,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:16,215 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:16,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:16,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:16,222 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:16,254 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:16,255 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:16,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:16,255 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:16,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814252979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:16,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:16,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:16,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675298282] [2021-06-12 20:03:16,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:16,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:16,313 INFO L87 Difference]: Start difference. First operand 2391 states and 6806 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:17,135 INFO L93 Difference]: Finished difference Result 3441 states and 9378 transitions. [2021-06-12 20:03:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:03:17,136 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:17,140 INFO L225 Difference]: With dead ends: 3441 [2021-06-12 20:03:17,140 INFO L226 Difference]: Without dead ends: 3441 [2021-06-12 20:03:17,140 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 694.0ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:03:17,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-12 20:03:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 2400. [2021-06-12 20:03:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.850354314297624) internal successors, (6838), 2399 states have internal predecessors, (6838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6838 transitions. [2021-06-12 20:03:17,179 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6838 transitions. Word has length 19 [2021-06-12 20:03:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:17,179 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6838 transitions. [2021-06-12 20:03:17,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6838 transitions. [2021-06-12 20:03:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:17,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:17,182 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:17,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4271,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:17,383 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2005418532, now seen corresponding path program 556 times [2021-06-12 20:03:17,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:17,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203506417] [2021-06-12 20:03:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:17,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:17,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203506417] [2021-06-12 20:03:17,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203506417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949462469] [2021-06-12 20:03:17,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:17,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:17,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:17,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:17,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:17,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:17,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:17,709 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:17,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:17,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:17,745 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:17,745 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:17,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:17,746 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:17,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949462469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:17,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:17,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:17,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422741394] [2021-06-12 20:03:17,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:17,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:17,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:17,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:17,820 INFO L87 Difference]: Start difference. First operand 2400 states and 6838 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:18,654 INFO L93 Difference]: Finished difference Result 3362 states and 9269 transitions. [2021-06-12 20:03:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:03:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:18,658 INFO L225 Difference]: With dead ends: 3362 [2021-06-12 20:03:18,658 INFO L226 Difference]: Without dead ends: 3359 [2021-06-12 20:03:18,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 788.5ms TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:03:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2021-06-12 20:03:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2402. [2021-06-12 20:03:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2402 states, 2401 states have (on average 2.8504789670970427) internal successors, (6844), 2401 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2402 states to 2402 states and 6844 transitions. [2021-06-12 20:03:18,689 INFO L78 Accepts]: Start accepts. Automaton has 2402 states and 6844 transitions. Word has length 19 [2021-06-12 20:03:18,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:18,689 INFO L482 AbstractCegarLoop]: Abstraction has 2402 states and 6844 transitions. [2021-06-12 20:03:18,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2402 states and 6844 transitions. [2021-06-12 20:03:18,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:18,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:18,692 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:18,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4275 [2021-06-12 20:03:18,902 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:18,903 INFO L82 PathProgramCache]: Analyzing trace with hash -571205058, now seen corresponding path program 557 times [2021-06-12 20:03:18,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:18,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740991261] [2021-06-12 20:03:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740991261] [2021-06-12 20:03:19,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740991261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403524009] [2021-06-12 20:03:19,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:19,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:19,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:19,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:19,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:19,252 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:19,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:19,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:19,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:19,290 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:19,290 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:19,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:19,291 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:19,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403524009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:19,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:19,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:19,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247085778] [2021-06-12 20:03:19,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:19,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:19,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:19,350 INFO L87 Difference]: Start difference. First operand 2402 states and 6844 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:19,878 INFO L93 Difference]: Finished difference Result 3351 states and 9253 transitions. [2021-06-12 20:03:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:19,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:19,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:19,882 INFO L225 Difference]: With dead ends: 3351 [2021-06-12 20:03:19,882 INFO L226 Difference]: Without dead ends: 3351 [2021-06-12 20:03:19,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-06-12 20:03:19,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2400. [2021-06-12 20:03:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.8495206335973324) internal successors, (6836), 2399 states have internal predecessors, (6836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6836 transitions. [2021-06-12 20:03:19,915 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6836 transitions. Word has length 19 [2021-06-12 20:03:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:19,915 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6836 transitions. [2021-06-12 20:03:19,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6836 transitions. [2021-06-12 20:03:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:19,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:19,917 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:20,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4281 [2021-06-12 20:03:20,118 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1144374456, now seen corresponding path program 558 times [2021-06-12 20:03:20,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:20,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782943163] [2021-06-12 20:03:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:20,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:20,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782943163] [2021-06-12 20:03:20,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782943163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:20,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532862391] [2021-06-12 20:03:20,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:20,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:20,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:20,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:20,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:20,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:20,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,490 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:20,491 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:20,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:20,491 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:20,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532862391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:20,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:20,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:20,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207384130] [2021-06-12 20:03:20,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:20,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:20,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:20,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:20,517 INFO L87 Difference]: Start difference. First operand 2400 states and 6836 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:20,865 INFO L93 Difference]: Finished difference Result 2744 states and 7675 transitions. [2021-06-12 20:03:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:03:20,865 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:20,868 INFO L225 Difference]: With dead ends: 2744 [2021-06-12 20:03:20,868 INFO L226 Difference]: Without dead ends: 2744 [2021-06-12 20:03:20,868 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2021-06-12 20:03:20,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2406. [2021-06-12 20:03:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.849064449064449) internal successors, (6852), 2405 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6852 transitions. [2021-06-12 20:03:20,893 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6852 transitions. Word has length 19 [2021-06-12 20:03:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:20,893 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 6852 transitions. [2021-06-12 20:03:20,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6852 transitions. [2021-06-12 20:03:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:20,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:20,895 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:21,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4285 [2021-06-12 20:03:21,111 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:21,112 INFO L82 PathProgramCache]: Analyzing trace with hash -63036388, now seen corresponding path program 559 times [2021-06-12 20:03:21,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:21,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367268036] [2021-06-12 20:03:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:21,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367268036] [2021-06-12 20:03:21,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367268036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293782196] [2021-06-12 20:03:21,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:21,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:21,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:21,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:21,483 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:21,487 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:21,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:21,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:21,494 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:21,498 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:21,531 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:21,532 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:21,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:21,533 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:21,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293782196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:21,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:21,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:21,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876939223] [2021-06-12 20:03:21,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:21,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:21,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:21,568 INFO L87 Difference]: Start difference. First operand 2406 states and 6852 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:22,027 INFO L93 Difference]: Finished difference Result 2733 states and 7643 transitions. [2021-06-12 20:03:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:03:22,027 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:22,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:22,030 INFO L225 Difference]: With dead ends: 2733 [2021-06-12 20:03:22,030 INFO L226 Difference]: Without dead ends: 2728 [2021-06-12 20:03:22,030 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:03:22,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2021-06-12 20:03:22,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2409. [2021-06-12 20:03:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.846345514950166) internal successors, (6854), 2408 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6854 transitions. [2021-06-12 20:03:22,056 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6854 transitions. Word has length 19 [2021-06-12 20:03:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:22,057 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6854 transitions. [2021-06-12 20:03:22,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6854 transitions. [2021-06-12 20:03:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:22,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:22,059 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:22,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4288 [2021-06-12 20:03:22,275 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:22,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:22,275 INFO L82 PathProgramCache]: Analyzing trace with hash -487572710, now seen corresponding path program 560 times [2021-06-12 20:03:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:22,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157220904] [2021-06-12 20:03:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:22,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157220904] [2021-06-12 20:03:22,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157220904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430954495] [2021-06-12 20:03:22,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:22,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:22,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:22,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:22,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:22,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:22,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:22,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:22,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,613 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:22,613 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:22,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:22,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:22,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430954495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:22,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:22,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:22,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756821224] [2021-06-12 20:03:22,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:22,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:22,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:22,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:22,639 INFO L87 Difference]: Start difference. First operand 2409 states and 6854 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:23,499 INFO L93 Difference]: Finished difference Result 2767 states and 7721 transitions. [2021-06-12 20:03:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:03:23,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:23,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:23,503 INFO L225 Difference]: With dead ends: 2767 [2021-06-12 20:03:23,503 INFO L226 Difference]: Without dead ends: 2767 [2021-06-12 20:03:23,503 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 732.1ms TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:03:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-06-12 20:03:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2405. [2021-06-12 20:03:23,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 2.8494176372712148) internal successors, (6850), 2404 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 6850 transitions. [2021-06-12 20:03:23,527 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 6850 transitions. Word has length 19 [2021-06-12 20:03:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:23,527 INFO L482 AbstractCegarLoop]: Abstraction has 2405 states and 6850 transitions. [2021-06-12 20:03:23,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 6850 transitions. [2021-06-12 20:03:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:23,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:23,529 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:23,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4295,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:23,730 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 443309878, now seen corresponding path program 561 times [2021-06-12 20:03:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:23,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349148258] [2021-06-12 20:03:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:23,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:23,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349148258] [2021-06-12 20:03:23,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349148258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:23,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861356462] [2021-06-12 20:03:23,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:23,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:03:23,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:24,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:24,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:24,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:24,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:24,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:24,098 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:24,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:24,104 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:24,134 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:24,134 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:24,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:24,135 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:24,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861356462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:24,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:24,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884444097] [2021-06-12 20:03:24,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:24,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:24,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:24,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:24,166 INFO L87 Difference]: Start difference. First operand 2405 states and 6850 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:24,566 INFO L93 Difference]: Finished difference Result 2727 states and 7638 transitions. [2021-06-12 20:03:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:03:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:24,569 INFO L225 Difference]: With dead ends: 2727 [2021-06-12 20:03:24,569 INFO L226 Difference]: Without dead ends: 2723 [2021-06-12 20:03:24,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:03:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-06-12 20:03:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2406. [2021-06-12 20:03:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 2.849064449064449) internal successors, (6852), 2405 states have internal predecessors, (6852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 6852 transitions. [2021-06-12 20:03:24,594 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 6852 transitions. Word has length 19 [2021-06-12 20:03:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:24,594 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 6852 transitions. [2021-06-12 20:03:24,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 6852 transitions. [2021-06-12 20:03:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:24,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:24,596 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:24,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4298 [2021-06-12 20:03:24,805 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1648594824, now seen corresponding path program 562 times [2021-06-12 20:03:24,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:24,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048646959] [2021-06-12 20:03:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:24,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:24,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048646959] [2021-06-12 20:03:24,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048646959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:24,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839432703] [2021-06-12 20:03:24,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:24,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:24,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:24,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:24,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:25,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:25,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:25,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:25,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,166 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:25,166 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:25,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:25,167 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:25,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839432703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:25,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:25,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:25,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157389655] [2021-06-12 20:03:25,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:25,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:25,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:25,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:25,192 INFO L87 Difference]: Start difference. First operand 2406 states and 6852 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:26,872 INFO L93 Difference]: Finished difference Result 2939 states and 8028 transitions. [2021-06-12 20:03:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 20:03:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:26,876 INFO L225 Difference]: With dead ends: 2939 [2021-06-12 20:03:26,876 INFO L226 Difference]: Without dead ends: 2939 [2021-06-12 20:03:26,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1275.5ms TimeCoverageRelationStatistics Valid=404, Invalid=3378, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 20:03:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-06-12 20:03:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2427. [2021-06-12 20:03:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 2426 states have (on average 2.8544929925803793) internal successors, (6925), 2426 states have internal predecessors, (6925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 6925 transitions. [2021-06-12 20:03:26,909 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 6925 transitions. Word has length 19 [2021-06-12 20:03:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:26,909 INFO L482 AbstractCegarLoop]: Abstraction has 2427 states and 6925 transitions. [2021-06-12 20:03:26,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:26,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 6925 transitions. [2021-06-12 20:03:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:26,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:26,911 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:27,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4305,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:27,111 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:27,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:27,112 INFO L82 PathProgramCache]: Analyzing trace with hash -94545700, now seen corresponding path program 563 times [2021-06-12 20:03:27,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:27,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760023568] [2021-06-12 20:03:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:27,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760023568] [2021-06-12 20:03:27,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760023568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845839050] [2021-06-12 20:03:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:27,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:03:27,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:27,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:27,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:27,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:27,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:27,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:27,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:27,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:27,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:27,517 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:27,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:27,548 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:27,549 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:27,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:27,549 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:27,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845839050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:27,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:27,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:27,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205085516] [2021-06-12 20:03:27,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:27,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:27,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:27,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:27,579 INFO L87 Difference]: Start difference. First operand 2427 states and 6925 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:28,007 INFO L93 Difference]: Finished difference Result 2764 states and 7736 transitions. [2021-06-12 20:03:28,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:03:28,007 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:28,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:28,010 INFO L225 Difference]: With dead ends: 2764 [2021-06-12 20:03:28,010 INFO L226 Difference]: Without dead ends: 2761 [2021-06-12 20:03:28,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 423.0ms TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:03:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-06-12 20:03:28,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2433. [2021-06-12 20:03:28,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.8536184210526314) internal successors, (6940), 2432 states have internal predecessors, (6940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6940 transitions. [2021-06-12 20:03:28,036 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6940 transitions. Word has length 19 [2021-06-12 20:03:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:28,036 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6940 transitions. [2021-06-12 20:03:28,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6940 transitions. [2021-06-12 20:03:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:28,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:28,038 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:28,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4308 [2021-06-12 20:03:28,257 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:28,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1408952486, now seen corresponding path program 564 times [2021-06-12 20:03:28,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:28,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558693233] [2021-06-12 20:03:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:28,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:28,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558693233] [2021-06-12 20:03:28,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558693233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949637316] [2021-06-12 20:03:28,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:28,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:28,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:28,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:28,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:28,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:28,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:28,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,610 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:28,610 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:28,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:28,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:28,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949637316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:28,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:28,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:28,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960211762] [2021-06-12 20:03:28,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:28,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:28,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:28,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:28,634 INFO L87 Difference]: Start difference. First operand 2433 states and 6940 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:29,720 INFO L93 Difference]: Finished difference Result 2909 states and 8003 transitions. [2021-06-12 20:03:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:03:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:29,723 INFO L225 Difference]: With dead ends: 2909 [2021-06-12 20:03:29,723 INFO L226 Difference]: Without dead ends: 2909 [2021-06-12 20:03:29,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:03:29,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-06-12 20:03:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2448. [2021-06-12 20:03:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 2447 states have (on average 2.8573763792398856) internal successors, (6992), 2447 states have internal predecessors, (6992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 6992 transitions. [2021-06-12 20:03:29,747 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 6992 transitions. Word has length 19 [2021-06-12 20:03:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:29,747 INFO L482 AbstractCegarLoop]: Abstraction has 2448 states and 6992 transitions. [2021-06-12 20:03:29,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 6992 transitions. [2021-06-12 20:03:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:29,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:29,750 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:29,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4315 [2021-06-12 20:03:29,950 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:29,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:29,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1966314102, now seen corresponding path program 565 times [2021-06-12 20:03:29,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:29,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436713539] [2021-06-12 20:03:29,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:30,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436713539] [2021-06-12 20:03:30,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436713539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714898149] [2021-06-12 20:03:30,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:30,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:30,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:30,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:30,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:30,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:30,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:30,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:30,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:30,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:30,307 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:30,307 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:30,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:30,308 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:30,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714898149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:30,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:30,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:30,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244761361] [2021-06-12 20:03:30,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:30,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:30,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:30,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:30,337 INFO L87 Difference]: Start difference. First operand 2448 states and 6992 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:30,758 INFO L93 Difference]: Finished difference Result 2791 states and 7810 transitions. [2021-06-12 20:03:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:03:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:30,761 INFO L225 Difference]: With dead ends: 2791 [2021-06-12 20:03:30,761 INFO L226 Difference]: Without dead ends: 2789 [2021-06-12 20:03:30,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:03:30,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-06-12 20:03:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2451. [2021-06-12 20:03:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2450 states have (on average 2.857551020408163) internal successors, (7001), 2450 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 7001 transitions. [2021-06-12 20:03:30,784 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 7001 transitions. Word has length 19 [2021-06-12 20:03:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:30,784 INFO L482 AbstractCegarLoop]: Abstraction has 2451 states and 7001 transitions. [2021-06-12 20:03:30,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 7001 transitions. [2021-06-12 20:03:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:30,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:30,786 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:30,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4318,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:30,986 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1401222088, now seen corresponding path program 566 times [2021-06-12 20:03:30,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:30,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580833136] [2021-06-12 20:03:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:31,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:31,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580833136] [2021-06-12 20:03:31,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580833136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660687536] [2021-06-12 20:03:31,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:31,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:31,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:31,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:31,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:31,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:31,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:31,266 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:31,298 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:31,298 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:31,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:31,298 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:31,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660687536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:31,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:31,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:31,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324560957] [2021-06-12 20:03:31,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:31,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:31,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:31,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:31,351 INFO L87 Difference]: Start difference. First operand 2451 states and 7001 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:32,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:32,139 INFO L93 Difference]: Finished difference Result 2910 states and 8009 transitions. [2021-06-12 20:03:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:03:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:32,143 INFO L225 Difference]: With dead ends: 2910 [2021-06-12 20:03:32,143 INFO L226 Difference]: Without dead ends: 2910 [2021-06-12 20:03:32,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:03:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-06-12 20:03:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2417. [2021-06-12 20:03:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8489238410596025) internal successors, (6883), 2416 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6883 transitions. [2021-06-12 20:03:32,168 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6883 transitions. Word has length 19 [2021-06-12 20:03:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:32,168 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6883 transitions. [2021-06-12 20:03:32,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6883 transitions. [2021-06-12 20:03:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:32,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:32,170 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:32,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4325 [2021-06-12 20:03:32,370 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:32,371 INFO L82 PathProgramCache]: Analyzing trace with hash -599605860, now seen corresponding path program 567 times [2021-06-12 20:03:32,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:32,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554024344] [2021-06-12 20:03:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:32,608 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-12 20:03:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:32,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:32,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554024344] [2021-06-12 20:03:32,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554024344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:32,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380802259] [2021-06-12 20:03:32,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:32,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:32,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:32,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:32,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:33,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:33,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:33,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:33,114 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:33,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:33,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:33,156 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:33,156 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:33,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:33,157 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:33,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380802259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:33,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:33,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:33,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606592284] [2021-06-12 20:03:33,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:33,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:33,236 INFO L87 Difference]: Start difference. First operand 2417 states and 6883 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:33,849 INFO L93 Difference]: Finished difference Result 2771 states and 7716 transitions. [2021-06-12 20:03:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:03:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:33,853 INFO L225 Difference]: With dead ends: 2771 [2021-06-12 20:03:33,853 INFO L226 Difference]: Without dead ends: 2768 [2021-06-12 20:03:33,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 894.9ms TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:03:33,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2021-06-12 20:03:33,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2419. [2021-06-12 20:03:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2419 states, 2418 states have (on average 2.849048800661704) internal successors, (6889), 2418 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2419 states to 2419 states and 6889 transitions. [2021-06-12 20:03:33,883 INFO L78 Accepts]: Start accepts. Automaton has 2419 states and 6889 transitions. Word has length 19 [2021-06-12 20:03:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:33,883 INFO L482 AbstractCegarLoop]: Abstraction has 2419 states and 6889 transitions. [2021-06-12 20:03:33,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2419 states and 6889 transitions. [2021-06-12 20:03:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:33,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:33,886 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:34,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4329 [2021-06-12 20:03:34,101 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:34,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1118737846, now seen corresponding path program 568 times [2021-06-12 20:03:34,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:34,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054399535] [2021-06-12 20:03:34,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:34,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:34,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054399535] [2021-06-12 20:03:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054399535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:34,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408554747] [2021-06-12 20:03:34,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:34,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:34,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:34,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:34,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:34,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:34,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:34,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:34,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:34,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:34,471 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:34,472 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:34,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:34,472 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:34,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408554747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:34,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:34,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:34,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181009673] [2021-06-12 20:03:34,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:34,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:34,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:34,532 INFO L87 Difference]: Start difference. First operand 2419 states and 6889 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:34,959 INFO L93 Difference]: Finished difference Result 2769 states and 7714 transitions. [2021-06-12 20:03:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:03:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:34,962 INFO L225 Difference]: With dead ends: 2769 [2021-06-12 20:03:34,962 INFO L226 Difference]: Without dead ends: 2769 [2021-06-12 20:03:34,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 419.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-06-12 20:03:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2410. [2021-06-12 20:03:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2409 states have (on average 2.8484848484848486) internal successors, (6862), 2409 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 6862 transitions. [2021-06-12 20:03:34,988 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 6862 transitions. Word has length 19 [2021-06-12 20:03:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:34,988 INFO L482 AbstractCegarLoop]: Abstraction has 2410 states and 6862 transitions. [2021-06-12 20:03:34,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 6862 transitions. [2021-06-12 20:03:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:34,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:34,991 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:35,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4335,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:35,207 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash -44673570, now seen corresponding path program 569 times [2021-06-12 20:03:35,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:35,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189894755] [2021-06-12 20:03:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:35,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:35,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189894755] [2021-06-12 20:03:35,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189894755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015118520] [2021-06-12 20:03:35,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:35,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:03:35,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:35,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:35,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:35,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:35,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,610 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:35,610 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:35,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:35,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:35,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015118520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:35,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:35,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:35,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771409950] [2021-06-12 20:03:35,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:35,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:35,637 INFO L87 Difference]: Start difference. First operand 2410 states and 6862 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:36,016 INFO L93 Difference]: Finished difference Result 2776 states and 7745 transitions. [2021-06-12 20:03:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:36,019 INFO L225 Difference]: With dead ends: 2776 [2021-06-12 20:03:36,019 INFO L226 Difference]: Without dead ends: 2776 [2021-06-12 20:03:36,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:03:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-12 20:03:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2412. [2021-06-12 20:03:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.848610535047698) internal successors, (6868), 2411 states have internal predecessors, (6868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6868 transitions. [2021-06-12 20:03:36,047 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6868 transitions. Word has length 19 [2021-06-12 20:03:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:36,047 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6868 transitions. [2021-06-12 20:03:36,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6868 transitions. [2021-06-12 20:03:36,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:36,049 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:36,049 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:36,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4339 [2021-06-12 20:03:36,265 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:36,266 INFO L82 PathProgramCache]: Analyzing trace with hash 886209018, now seen corresponding path program 570 times [2021-06-12 20:03:36,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:36,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838563449] [2021-06-12 20:03:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:36,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:36,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838563449] [2021-06-12 20:03:36,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838563449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:36,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681198037] [2021-06-12 20:03:36,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:36,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:03:36,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:36,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:36,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:36,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:36,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:36,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:36,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:36,610 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:36,613 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:36,616 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:36,645 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:36,645 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:36,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:36,646 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:36,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681198037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:36,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:36,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:36,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747744594] [2021-06-12 20:03:36,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:36,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:36,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:36,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:36,676 INFO L87 Difference]: Start difference. First operand 2412 states and 6868 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:37,204 INFO L93 Difference]: Finished difference Result 2737 states and 7656 transitions. [2021-06-12 20:03:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:03:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:37,207 INFO L225 Difference]: With dead ends: 2737 [2021-06-12 20:03:37,207 INFO L226 Difference]: Without dead ends: 2729 [2021-06-12 20:03:37,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:03:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-12 20:03:37,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2412. [2021-06-12 20:03:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.8473662380754874) internal successors, (6865), 2411 states have internal predecessors, (6865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 6865 transitions. [2021-06-12 20:03:37,233 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 6865 transitions. Word has length 19 [2021-06-12 20:03:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:37,233 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 6865 transitions. [2021-06-12 20:03:37,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 6865 transitions. [2021-06-12 20:03:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:37,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:37,236 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:37,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-12 20:03:37,436 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:37,436 INFO L82 PathProgramCache]: Analyzing trace with hash 649198238, now seen corresponding path program 571 times [2021-06-12 20:03:37,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:37,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851783767] [2021-06-12 20:03:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:37,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:37,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851783767] [2021-06-12 20:03:37,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851783767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837579362] [2021-06-12 20:03:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:37,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:37,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:37,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:37,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:37,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:37,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:37,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:37,790 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:37,790 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:37,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:37,791 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837579362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:37,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:37,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722299311] [2021-06-12 20:03:37,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:37,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:37,869 INFO L87 Difference]: Start difference. First operand 2412 states and 6865 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:39,219 INFO L93 Difference]: Finished difference Result 2821 states and 7840 transitions. [2021-06-12 20:03:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:03:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:39,222 INFO L225 Difference]: With dead ends: 2821 [2021-06-12 20:03:39,222 INFO L226 Difference]: Without dead ends: 2814 [2021-06-12 20:03:39,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 996.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:03:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2021-06-12 20:03:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2441. [2021-06-12 20:03:39,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 2440 states have (on average 2.8540983606557377) internal successors, (6964), 2440 states have internal predecessors, (6964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 6964 transitions. [2021-06-12 20:03:39,249 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 6964 transitions. Word has length 19 [2021-06-12 20:03:39,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:39,249 INFO L482 AbstractCegarLoop]: Abstraction has 2441 states and 6964 transitions. [2021-06-12 20:03:39,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:39,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 6964 transitions. [2021-06-12 20:03:39,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:39,251 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:39,251 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:39,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4349 [2021-06-12 20:03:39,468 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:39,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:39,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1995180024, now seen corresponding path program 572 times [2021-06-12 20:03:39,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:39,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415824522] [2021-06-12 20:03:39,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:39,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:39,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:39,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415824522] [2021-06-12 20:03:39,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415824522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762628712] [2021-06-12 20:03:39,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:39,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:39,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:39,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:39,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:39,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:39,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:39,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:39,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,790 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:39,790 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:39,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:39,791 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:39,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762628712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:39,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:39,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:39,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052661618] [2021-06-12 20:03:39,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:39,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:39,816 INFO L87 Difference]: Start difference. First operand 2441 states and 6964 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:40,999 INFO L93 Difference]: Finished difference Result 3027 states and 8251 transitions. [2021-06-12 20:03:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 20:03:40,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:41,003 INFO L225 Difference]: With dead ends: 3027 [2021-06-12 20:03:41,003 INFO L226 Difference]: Without dead ends: 3027 [2021-06-12 20:03:41,003 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=234, Invalid=2216, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 20:03:41,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2021-06-12 20:03:41,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 2459. [2021-06-12 20:03:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2459 states, 2458 states have (on average 2.856387306753458) internal successors, (7021), 2458 states have internal predecessors, (7021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2459 states to 2459 states and 7021 transitions. [2021-06-12 20:03:41,032 INFO L78 Accepts]: Start accepts. Automaton has 2459 states and 7021 transitions. Word has length 19 [2021-06-12 20:03:41,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:41,032 INFO L482 AbstractCegarLoop]: Abstraction has 2459 states and 7021 transitions. [2021-06-12 20:03:41,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:41,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2459 states and 7021 transitions. [2021-06-12 20:03:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:41,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:41,035 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:41,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4354 [2021-06-12 20:03:41,251 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -745738148, now seen corresponding path program 573 times [2021-06-12 20:03:41,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:41,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840780828] [2021-06-12 20:03:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:41,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:41,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840780828] [2021-06-12 20:03:41,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840780828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:41,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740183141] [2021-06-12 20:03:41,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:41,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:03:41,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:41,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:41,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:41,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:41,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:41,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:41,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:41,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:41,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:41,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:41,601 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:41,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:41,606 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:41,635 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:41,636 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:41,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:41,637 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:41,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740183141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:41,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:41,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:41,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380319911] [2021-06-12 20:03:41,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:41,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:41,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:41,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:41,666 INFO L87 Difference]: Start difference. First operand 2459 states and 7021 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:42,510 INFO L93 Difference]: Finished difference Result 2838 states and 7882 transitions. [2021-06-12 20:03:42,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:03:42,510 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:42,513 INFO L225 Difference]: With dead ends: 2838 [2021-06-12 20:03:42,513 INFO L226 Difference]: Without dead ends: 2832 [2021-06-12 20:03:42,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 667.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:03:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-12 20:03:42,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2460. [2021-06-12 20:03:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2460 states, 2459 states have (on average 2.854005693371289) internal successors, (7018), 2459 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2460 states to 2460 states and 7018 transitions. [2021-06-12 20:03:42,540 INFO L78 Accepts]: Start accepts. Automaton has 2460 states and 7018 transitions. Word has length 19 [2021-06-12 20:03:42,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:42,540 INFO L482 AbstractCegarLoop]: Abstraction has 2460 states and 7018 transitions. [2021-06-12 20:03:42,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2460 states and 7018 transitions. [2021-06-12 20:03:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:42,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:42,542 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:42,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4357,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:42,758 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:42,758 INFO L82 PathProgramCache]: Analyzing trace with hash -444893350, now seen corresponding path program 574 times [2021-06-12 20:03:42,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:42,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859441338] [2021-06-12 20:03:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:42,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859441338] [2021-06-12 20:03:42,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859441338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:42,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146339941] [2021-06-12 20:03:42,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:42,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:42,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:42,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:42,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:43,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:43,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:43,079 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:43,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:43,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:43,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:43,120 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:43,121 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:43,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:43,121 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146339941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:43,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:43,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505972139] [2021-06-12 20:03:43,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:43,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:43,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:43,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:43,206 INFO L87 Difference]: Start difference. First operand 2460 states and 7018 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:44,398 INFO L93 Difference]: Finished difference Result 2982 states and 8286 transitions. [2021-06-12 20:03:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:03:44,398 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:44,401 INFO L225 Difference]: With dead ends: 2982 [2021-06-12 20:03:44,401 INFO L226 Difference]: Without dead ends: 2976 [2021-06-12 20:03:44,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 927.9ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:03:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-12 20:03:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2507. [2021-06-12 20:03:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2506 states have (on average 2.8591380686352754) internal successors, (7165), 2506 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 7165 transitions. [2021-06-12 20:03:44,429 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 7165 transitions. Word has length 19 [2021-06-12 20:03:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:44,429 INFO L482 AbstractCegarLoop]: Abstraction has 2507 states and 7165 transitions. [2021-06-12 20:03:44,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 7165 transitions. [2021-06-12 20:03:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:44,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:44,431 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:44,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4364 [2021-06-12 20:03:44,645 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash -987059554, now seen corresponding path program 575 times [2021-06-12 20:03:44,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:44,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486948556] [2021-06-12 20:03:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:44,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:44,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486948556] [2021-06-12 20:03:44,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486948556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:44,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264854950] [2021-06-12 20:03:44,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:44,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:03:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:44,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:44,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:44,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:44,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:44,942 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,964 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:44,964 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:44,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:44,965 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:44,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264854950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:44,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:44,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:44,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248672414] [2021-06-12 20:03:44,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:44,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:44,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:44,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:44,987 INFO L87 Difference]: Start difference. First operand 2507 states and 7165 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:45,920 INFO L93 Difference]: Finished difference Result 3168 states and 8669 transitions. [2021-06-12 20:03:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:03:45,920 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:45,924 INFO L225 Difference]: With dead ends: 3168 [2021-06-12 20:03:45,924 INFO L226 Difference]: Without dead ends: 3168 [2021-06-12 20:03:45,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:03:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-06-12 20:03:45,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2563. [2021-06-12 20:03:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.869242779078845) internal successors, (7351), 2562 states have internal predecessors, (7351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7351 transitions. [2021-06-12 20:03:45,955 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7351 transitions. Word has length 19 [2021-06-12 20:03:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:45,955 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7351 transitions. [2021-06-12 20:03:45,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7351 transitions. [2021-06-12 20:03:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:45,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:45,958 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:46,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4369,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:46,158 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:46,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1906760262, now seen corresponding path program 576 times [2021-06-12 20:03:46,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:46,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468403989] [2021-06-12 20:03:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:46,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468403989] [2021-06-12 20:03:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468403989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174414417] [2021-06-12 20:03:46,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:46,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:46,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:46,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:46,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:46,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:46,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:46,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:46,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:46,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:46,484 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:46,487 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:46,516 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:46,516 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:46,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:46,517 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:46,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174414417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:46,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:46,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:46,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371159437] [2021-06-12 20:03:46,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:46,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:46,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:46,546 INFO L87 Difference]: Start difference. First operand 2563 states and 7351 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:47,494 INFO L93 Difference]: Finished difference Result 2969 states and 8260 transitions. [2021-06-12 20:03:47,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:03:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:47,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:47,497 INFO L225 Difference]: With dead ends: 2969 [2021-06-12 20:03:47,497 INFO L226 Difference]: Without dead ends: 2965 [2021-06-12 20:03:47,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 706.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1637, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:03:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-06-12 20:03:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2564. [2021-06-12 20:03:47,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2564 states, 2563 states have (on average 2.865001950838861) internal successors, (7343), 2563 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2564 states to 2564 states and 7343 transitions. [2021-06-12 20:03:47,527 INFO L78 Accepts]: Start accepts. Automaton has 2564 states and 7343 transitions. Word has length 19 [2021-06-12 20:03:47,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:47,527 INFO L482 AbstractCegarLoop]: Abstraction has 2564 states and 7343 transitions. [2021-06-12 20:03:47,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:47,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2564 states and 7343 transitions. [2021-06-12 20:03:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:47,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:47,530 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:47,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4372,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:47,737 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash 628192030, now seen corresponding path program 577 times [2021-06-12 20:03:47,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:47,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694695398] [2021-06-12 20:03:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:47,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694695398] [2021-06-12 20:03:47,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694695398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:47,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007165011] [2021-06-12 20:03:47,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:47,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:47,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:47,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:47,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:47,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:47,990 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:47,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:47,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:47,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:48,025 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:48,025 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:48,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:48,025 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:48,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007165011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:48,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:48,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:48,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113793807] [2021-06-12 20:03:48,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:48,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:48,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:48,102 INFO L87 Difference]: Start difference. First operand 2564 states and 7343 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:49,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:49,554 INFO L93 Difference]: Finished difference Result 3112 states and 8553 transitions. [2021-06-12 20:03:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:03:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:49,558 INFO L225 Difference]: With dead ends: 3112 [2021-06-12 20:03:49,558 INFO L226 Difference]: Without dead ends: 3107 [2021-06-12 20:03:49,558 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1075.1ms TimeCoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:03:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-06-12 20:03:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2573. [2021-06-12 20:03:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 2.8635303265940903) internal successors, (7365), 2572 states have internal predecessors, (7365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 7365 transitions. [2021-06-12 20:03:49,586 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 7365 transitions. Word has length 19 [2021-06-12 20:03:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:49,586 INFO L482 AbstractCegarLoop]: Abstraction has 2573 states and 7365 transitions. [2021-06-12 20:03:49,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 7365 transitions. [2021-06-12 20:03:49,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:49,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:49,588 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:49,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4379,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:49,801 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:49,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1826233144, now seen corresponding path program 578 times [2021-06-12 20:03:49,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:49,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108133174] [2021-06-12 20:03:49,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:49,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:49,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108133174] [2021-06-12 20:03:49,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108133174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:49,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993838190] [2021-06-12 20:03:49,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:49,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:49,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:49,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:49,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:50,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:50,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:50,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:50,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:50,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:50,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:50,117 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:50,117 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:50,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:50,118 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:50,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993838190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:50,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:50,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:50,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328067547] [2021-06-12 20:03:50,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:50,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:50,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:50,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:50,181 INFO L87 Difference]: Start difference. First operand 2573 states and 7365 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:51,386 INFO L93 Difference]: Finished difference Result 3156 states and 8624 transitions. [2021-06-12 20:03:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 20:03:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:51,389 INFO L225 Difference]: With dead ends: 3156 [2021-06-12 20:03:51,389 INFO L226 Difference]: Without dead ends: 3156 [2021-06-12 20:03:51,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 830.0ms TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:03:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-06-12 20:03:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2594. [2021-06-12 20:03:51,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2594 states, 2593 states have (on average 2.866949479367528) internal successors, (7434), 2593 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2594 states to 2594 states and 7434 transitions. [2021-06-12 20:03:51,419 INFO L78 Accepts]: Start accepts. Automaton has 2594 states and 7434 transitions. Word has length 19 [2021-06-12 20:03:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:51,419 INFO L482 AbstractCegarLoop]: Abstraction has 2594 states and 7434 transitions. [2021-06-12 20:03:51,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2594 states and 7434 transitions. [2021-06-12 20:03:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:51,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:51,421 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:51,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4384 [2021-06-12 20:03:51,639 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:51,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:51,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1667117924, now seen corresponding path program 579 times [2021-06-12 20:03:51,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:51,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702950165] [2021-06-12 20:03:51,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:51,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:51,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702950165] [2021-06-12 20:03:51,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702950165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:51,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566959152] [2021-06-12 20:03:51,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:51,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:03:51,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:51,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:51,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:51,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:51,909 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:51,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:51,912 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:51,943 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:51,944 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:51,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:51,944 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:52,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566959152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:52,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:52,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:52,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378278895] [2021-06-12 20:03:52,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:52,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:52,015 INFO L87 Difference]: Start difference. First operand 2594 states and 7434 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:53,542 INFO L93 Difference]: Finished difference Result 3128 states and 8611 transitions. [2021-06-12 20:03:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 20:03:53,542 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:53,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:53,545 INFO L225 Difference]: With dead ends: 3128 [2021-06-12 20:03:53,545 INFO L226 Difference]: Without dead ends: 3120 [2021-06-12 20:03:53,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1035.5ms TimeCoverageRelationStatistics Valid=293, Invalid=3367, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 20:03:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3120 states. [2021-06-12 20:03:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3120 to 2635. [2021-06-12 20:03:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.8549734244495064) internal successors, (7520), 2634 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 7520 transitions. [2021-06-12 20:03:53,574 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 7520 transitions. Word has length 19 [2021-06-12 20:03:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:53,574 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 7520 transitions. [2021-06-12 20:03:53,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 7520 transitions. [2021-06-12 20:03:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:53,576 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:53,576 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:53,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4388,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:53,776 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:53,777 INFO L82 PathProgramCache]: Analyzing trace with hash 51225782, now seen corresponding path program 580 times [2021-06-12 20:03:53,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:53,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842382615] [2021-06-12 20:03:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:53,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842382615] [2021-06-12 20:03:53,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842382615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:53,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354065614] [2021-06-12 20:03:53,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:53,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:03:53,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:53,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:54,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:54,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:54,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:54,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:54,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:54,085 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:03:54,086 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:54,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:03:54,086 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:03:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:54,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354065614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:54,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:54,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:54,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145586023] [2021-06-12 20:03:54,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:54,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:54,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:54,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:54,144 INFO L87 Difference]: Start difference. First operand 2635 states and 7520 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:55,171 INFO L93 Difference]: Finished difference Result 3125 states and 8616 transitions. [2021-06-12 20:03:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:03:55,172 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:55,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:55,175 INFO L225 Difference]: With dead ends: 3125 [2021-06-12 20:03:55,175 INFO L226 Difference]: Without dead ends: 3125 [2021-06-12 20:03:55,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 711.7ms TimeCoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:03:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-06-12 20:03:55,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2631. [2021-06-12 20:03:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 2.853231939163498) internal successors, (7504), 2630 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 7504 transitions. [2021-06-12 20:03:55,223 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 7504 transitions. Word has length 19 [2021-06-12 20:03:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:55,223 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 7504 transitions. [2021-06-12 20:03:55,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 7504 transitions. [2021-06-12 20:03:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:55,226 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:55,226 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:55,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4394 [2021-06-12 20:03:55,433 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1659387526, now seen corresponding path program 581 times [2021-06-12 20:03:55,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:55,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452799816] [2021-06-12 20:03:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:55,552 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:55,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:55,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452799816] [2021-06-12 20:03:55,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452799816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:55,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228802314] [2021-06-12 20:03:55,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:55,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:03:55,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:55,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:55,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:55,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:55,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:55,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,741 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:03:55,741 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:55,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:55,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:03:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:55,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228802314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:55,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:55,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-12 20:03:55,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486212235] [2021-06-12 20:03:55,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:03:55,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:55,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:03:55,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:03:55,769 INFO L87 Difference]: Start difference. First operand 2631 states and 7504 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:56,502 INFO L93 Difference]: Finished difference Result 3189 states and 8778 transitions. [2021-06-12 20:03:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:03:56,503 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:56,506 INFO L225 Difference]: With dead ends: 3189 [2021-06-12 20:03:56,506 INFO L226 Difference]: Without dead ends: 3189 [2021-06-12 20:03:56,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 412.2ms TimeCoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:03:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-06-12 20:03:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2576. [2021-06-12 20:03:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2576 states, 2575 states have (on average 2.84) internal successors, (7313), 2575 states have internal predecessors, (7313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2576 states to 2576 states and 7313 transitions. [2021-06-12 20:03:56,533 INFO L78 Accepts]: Start accepts. Automaton has 2576 states and 7313 transitions. Word has length 19 [2021-06-12 20:03:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:56,533 INFO L482 AbstractCegarLoop]: Abstraction has 2576 states and 7313 transitions. [2021-06-12 20:03:56,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2576 states and 7313 transitions. [2021-06-12 20:03:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:56,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:56,535 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:56,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4398 [2021-06-12 20:03:56,736 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:56,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1992996928, now seen corresponding path program 582 times [2021-06-12 20:03:56,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:56,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521222482] [2021-06-12 20:03:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:56,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521222482] [2021-06-12 20:03:56,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521222482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:56,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844747647] [2021-06-12 20:03:56,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:56,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:03:56,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:56,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:56,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:57,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:57,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:57,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,058 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:57,059 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:57,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:57,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:57,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844747647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:57,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:57,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:03:57,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845990863] [2021-06-12 20:03:57,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:03:57,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:03:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:57,082 INFO L87 Difference]: Start difference. First operand 2576 states and 7313 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:57,449 INFO L93 Difference]: Finished difference Result 2791 states and 7767 transitions. [2021-06-12 20:03:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:03:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:57,452 INFO L225 Difference]: With dead ends: 2791 [2021-06-12 20:03:57,452 INFO L226 Difference]: Without dead ends: 2791 [2021-06-12 20:03:57,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-12 20:03:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2603. [2021-06-12 20:03:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.840891621829362) internal successors, (7392), 2602 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7392 transitions. [2021-06-12 20:03:57,477 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7392 transitions. Word has length 19 [2021-06-12 20:03:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:57,477 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7392 transitions. [2021-06-12 20:03:57,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7392 transitions. [2021-06-12 20:03:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:57,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:57,480 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:57,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4400,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:57,680 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash 785586084, now seen corresponding path program 583 times [2021-06-12 20:03:57,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:57,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899075527] [2021-06-12 20:03:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:57,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:57,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:57,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899075527] [2021-06-12 20:03:57,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899075527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:57,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118681886] [2021-06-12 20:03:57,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:57,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:58,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:58,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:58,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:03:58,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:58,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:58,026 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:03:58,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:03:58,032 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:58,061 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:03:58,061 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:58,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:03:58,062 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:03:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:58,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118681886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:58,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:58,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:03:58,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278347889] [2021-06-12 20:03:58,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:03:58,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:58,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:03:58,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:58,091 INFO L87 Difference]: Start difference. First operand 2603 states and 7392 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:03:58,638 INFO L93 Difference]: Finished difference Result 2767 states and 7702 transitions. [2021-06-12 20:03:58,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:03:58,638 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:03:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:03:58,641 INFO L225 Difference]: With dead ends: 2767 [2021-06-12 20:03:58,641 INFO L226 Difference]: Without dead ends: 2757 [2021-06-12 20:03:58,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 514.2ms TimeCoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:03:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2021-06-12 20:03:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 2610. [2021-06-12 20:03:58,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 2.8359524722115754) internal successors, (7399), 2609 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 7399 transitions. [2021-06-12 20:03:58,667 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 7399 transitions. Word has length 19 [2021-06-12 20:03:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:03:58,667 INFO L482 AbstractCegarLoop]: Abstraction has 2610 states and 7399 transitions. [2021-06-12 20:03:58,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:03:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 7399 transitions. [2021-06-12 20:03:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:03:58,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:03:58,669 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:03:58,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4403,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:58,870 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:03:58,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:03:58,870 INFO L82 PathProgramCache]: Analyzing trace with hash 361049762, now seen corresponding path program 584 times [2021-06-12 20:03:58,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:03:58,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141469579] [2021-06-12 20:03:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:03:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:03:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:58,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:03:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141469579] [2021-06-12 20:03:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141469579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125025458] [2021-06-12 20:03:58,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:03:59,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:03:59,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:03:59,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:03:59,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:03:59,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:03:59,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:03:59,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:03:59,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,213 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:03:59,213 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:03:59,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:03:59,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:03:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:03:59,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125025458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:03:59,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:03:59,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:03:59,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66120075] [2021-06-12 20:03:59,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:03:59,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:03:59,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:03:59,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:03:59,236 INFO L87 Difference]: Start difference. First operand 2610 states and 7399 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:00,955 INFO L93 Difference]: Finished difference Result 2925 states and 8013 transitions. [2021-06-12 20:04:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 20:04:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:00,958 INFO L225 Difference]: With dead ends: 2925 [2021-06-12 20:04:00,958 INFO L226 Difference]: Without dead ends: 2925 [2021-06-12 20:04:00,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1510.6ms TimeCoverageRelationStatistics Valid=484, Invalid=3806, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 20:04:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2021-06-12 20:04:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2615. [2021-06-12 20:04:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.8389441469013006) internal successors, (7421), 2614 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 7421 transitions. [2021-06-12 20:04:00,986 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 7421 transitions. Word has length 19 [2021-06-12 20:04:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:00,986 INFO L482 AbstractCegarLoop]: Abstraction has 2615 states and 7421 transitions. [2021-06-12 20:04:00,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 7421 transitions. [2021-06-12 20:04:00,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:00,988 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:00,988 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:01,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4410,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:01,189 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:01,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:01,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1291932350, now seen corresponding path program 585 times [2021-06-12 20:04:01,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:01,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606743622] [2021-06-12 20:04:01,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:01,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606743622] [2021-06-12 20:04:01,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606743622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116904887] [2021-06-12 20:04:01,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:01,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:04:01,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:01,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:01,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:01,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:01,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:01,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:01,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:01,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:01,537 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:01,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:01,543 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:01,572 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:01,572 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:01,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:01,573 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:01,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116904887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:01,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:01,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:01,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829280926] [2021-06-12 20:04:01,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:01,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:01,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:01,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:01,604 INFO L87 Difference]: Start difference. First operand 2615 states and 7421 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:02,263 INFO L93 Difference]: Finished difference Result 2788 states and 7743 transitions. [2021-06-12 20:04:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:04:02,263 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:02,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:02,266 INFO L225 Difference]: With dead ends: 2788 [2021-06-12 20:04:02,266 INFO L226 Difference]: Without dead ends: 2780 [2021-06-12 20:04:02,266 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:04:02,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-06-12 20:04:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2619. [2021-06-12 20:04:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2618 states have (on average 2.8365164247517187) internal successors, (7426), 2618 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 7426 transitions. [2021-06-12 20:04:02,291 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 7426 transitions. Word has length 19 [2021-06-12 20:04:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:02,292 INFO L482 AbstractCegarLoop]: Abstraction has 2619 states and 7426 transitions. [2021-06-12 20:04:02,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 7426 transitions. [2021-06-12 20:04:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:02,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:02,294 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:02,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4413 [2021-06-12 20:04:02,494 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash -799972352, now seen corresponding path program 586 times [2021-06-12 20:04:02,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:02,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663114594] [2021-06-12 20:04:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:02,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663114594] [2021-06-12 20:04:02,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663114594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663671041] [2021-06-12 20:04:02,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:02,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:02,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:02,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:02,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:02,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:02,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:02,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,834 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:02,834 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:02,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:02,835 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:02,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663671041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:02,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:02,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:02,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355632643] [2021-06-12 20:04:02,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:02,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:02,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:02,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:02,857 INFO L87 Difference]: Start difference. First operand 2619 states and 7426 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:04,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:04,830 INFO L93 Difference]: Finished difference Result 2993 states and 8145 transitions. [2021-06-12 20:04:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 20:04:04,831 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:04,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:04,834 INFO L225 Difference]: With dead ends: 2993 [2021-06-12 20:04:04,834 INFO L226 Difference]: Without dead ends: 2993 [2021-06-12 20:04:04,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1320.4ms TimeCoverageRelationStatistics Valid=426, Invalid=3734, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 20:04:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-06-12 20:04:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2610. [2021-06-12 20:04:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2610 states, 2609 states have (on average 2.8443848217707934) internal successors, (7421), 2609 states have internal predecessors, (7421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:04,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2610 states to 2610 states and 7421 transitions. [2021-06-12 20:04:04,860 INFO L78 Accepts]: Start accepts. Automaton has 2610 states and 7421 transitions. Word has length 19 [2021-06-12 20:04:04,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:04,860 INFO L482 AbstractCegarLoop]: Abstraction has 2610 states and 7421 transitions. [2021-06-12 20:04:04,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:04,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2610 states and 7421 transitions. [2021-06-12 20:04:04,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:04,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:04,863 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:05,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-12 20:04:05,063 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash 754076772, now seen corresponding path program 587 times [2021-06-12 20:04:05,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:05,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425484228] [2021-06-12 20:04:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:05,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425484228] [2021-06-12 20:04:05,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425484228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:05,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159437547] [2021-06-12 20:04:05,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:05,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:05,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:05,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:05,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:05,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:05,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:05,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:05,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:05,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:05,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:05,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:05,437 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:05,437 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:05,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:05,438 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159437547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:05,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:05,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:05,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276722511] [2021-06-12 20:04:05,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:05,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:05,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:05,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:05,468 INFO L87 Difference]: Start difference. First operand 2610 states and 7421 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:05,875 INFO L93 Difference]: Finished difference Result 2719 states and 7669 transitions. [2021-06-12 20:04:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:04:05,875 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:05,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:05,877 INFO L225 Difference]: With dead ends: 2719 [2021-06-12 20:04:05,877 INFO L226 Difference]: Without dead ends: 2713 [2021-06-12 20:04:05,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 441.0ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:04:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-06-12 20:04:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2611. [2021-06-12 20:04:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2610 states have (on average 2.84367816091954) internal successors, (7422), 2610 states have internal predecessors, (7422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 7422 transitions. [2021-06-12 20:04:05,902 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 7422 transitions. Word has length 19 [2021-06-12 20:04:05,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:05,902 INFO L482 AbstractCegarLoop]: Abstraction has 2611 states and 7422 transitions. [2021-06-12 20:04:05,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:05,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 7422 transitions. [2021-06-12 20:04:05,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:05,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:05,905 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:06,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:06,105 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash -560330014, now seen corresponding path program 588 times [2021-06-12 20:04:06,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:06,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662985222] [2021-06-12 20:04:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:06,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:06,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662985222] [2021-06-12 20:04:06,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662985222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537511492] [2021-06-12 20:04:06,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:06,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:06,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:06,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:06,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:06,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:06,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:06,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,456 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:06,456 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:06,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:06,457 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:06,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537511492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:06,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:06,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:06,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24334112] [2021-06-12 20:04:06,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:06,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:06,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:06,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:06,479 INFO L87 Difference]: Start difference. First operand 2611 states and 7422 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:07,782 INFO L93 Difference]: Finished difference Result 2938 states and 8092 transitions. [2021-06-12 20:04:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:04:07,782 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:07,785 INFO L225 Difference]: With dead ends: 2938 [2021-06-12 20:04:07,786 INFO L226 Difference]: Without dead ends: 2938 [2021-06-12 20:04:07,786 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 899.1ms TimeCoverageRelationStatistics Valid=246, Invalid=2010, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:04:07,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-06-12 20:04:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2643. [2021-06-12 20:04:07,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.8497350492051474) internal successors, (7529), 2642 states have internal predecessors, (7529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 7529 transitions. [2021-06-12 20:04:07,813 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 7529 transitions. Word has length 19 [2021-06-12 20:04:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:07,813 INFO L482 AbstractCegarLoop]: Abstraction has 2643 states and 7529 transitions. [2021-06-12 20:04:07,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 7529 transitions. [2021-06-12 20:04:07,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:07,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:07,825 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:08,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4430 [2021-06-12 20:04:08,026 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:08,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:08,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1480030722, now seen corresponding path program 589 times [2021-06-12 20:04:08,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:08,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097248060] [2021-06-12 20:04:08,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:08,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:08,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:08,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097248060] [2021-06-12 20:04:08,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097248060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:08,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77606950] [2021-06-12 20:04:08,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:08,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:08,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:08,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:08,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:08,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:08,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:08,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:08,418 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:08,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:08,449 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:08,450 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:08,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:08,451 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:08,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77606950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:08,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:08,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:08,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246398750] [2021-06-12 20:04:08,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:08,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:08,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:08,481 INFO L87 Difference]: Start difference. First operand 2643 states and 7529 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:09,256 INFO L93 Difference]: Finished difference Result 2827 states and 7907 transitions. [2021-06-12 20:04:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:04:09,257 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:09,260 INFO L225 Difference]: With dead ends: 2827 [2021-06-12 20:04:09,260 INFO L226 Difference]: Without dead ends: 2823 [2021-06-12 20:04:09,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:04:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-06-12 20:04:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2659. [2021-06-12 20:04:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2658 states have (on average 2.8521444695259595) internal successors, (7581), 2658 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 7581 transitions. [2021-06-12 20:04:09,288 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 7581 transitions. Word has length 19 [2021-06-12 20:04:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:09,288 INFO L482 AbstractCegarLoop]: Abstraction has 2659 states and 7581 transitions. [2021-06-12 20:04:09,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:09,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 7581 transitions. [2021-06-12 20:04:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:09,291 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:09,291 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:09,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:09,505 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -552599616, now seen corresponding path program 590 times [2021-06-12 20:04:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:09,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84079150] [2021-06-12 20:04:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:09,640 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:09,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:09,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84079150] [2021-06-12 20:04:09,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84079150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:09,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264993938] [2021-06-12 20:04:09,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:09,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:09,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:09,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:09,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:09,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:09,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:09,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:09,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:09,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:09,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:09,901 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:09,902 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:09,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:09,912 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:10,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264993938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:10,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:10,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:10,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778421753] [2021-06-12 20:04:10,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:10,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:10,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:10,038 INFO L87 Difference]: Start difference. First operand 2659 states and 7581 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:10,838 INFO L93 Difference]: Finished difference Result 2939 states and 8127 transitions. [2021-06-12 20:04:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:04:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:10,841 INFO L225 Difference]: With dead ends: 2939 [2021-06-12 20:04:10,841 INFO L226 Difference]: Without dead ends: 2939 [2021-06-12 20:04:10,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 728.7ms TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:04:10,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2021-06-12 20:04:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2626. [2021-06-12 20:04:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2626 states, 2625 states have (on average 2.8445714285714288) internal successors, (7467), 2625 states have internal predecessors, (7467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2626 states to 2626 states and 7467 transitions. [2021-06-12 20:04:10,869 INFO L78 Accepts]: Start accepts. Automaton has 2626 states and 7467 transitions. Word has length 19 [2021-06-12 20:04:10,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:10,869 INFO L482 AbstractCegarLoop]: Abstraction has 2626 states and 7467 transitions. [2021-06-12 20:04:10,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:10,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2626 states and 7467 transitions. [2021-06-12 20:04:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:10,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:10,871 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:11,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4440 [2021-06-12 20:04:11,081 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:11,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:11,081 INFO L82 PathProgramCache]: Analyzing trace with hash 249016612, now seen corresponding path program 591 times [2021-06-12 20:04:11,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:11,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029108363] [2021-06-12 20:04:11,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:11,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:11,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029108363] [2021-06-12 20:04:11,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029108363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:11,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272337881] [2021-06-12 20:04:11,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:11,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:11,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:11,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:11,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:11,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:11,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:11,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:11,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:11,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:11,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:11,448 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:11,449 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:11,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:11,449 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:11,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:11,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272337881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:11,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:11,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:11,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689678921] [2021-06-12 20:04:11,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:11,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:11,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:11,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:11,534 INFO L87 Difference]: Start difference. First operand 2626 states and 7467 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:12,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:12,354 INFO L93 Difference]: Finished difference Result 2837 states and 7871 transitions. [2021-06-12 20:04:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:04:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:12,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:12,357 INFO L225 Difference]: With dead ends: 2837 [2021-06-12 20:04:12,357 INFO L226 Difference]: Without dead ends: 2833 [2021-06-12 20:04:12,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 728.7ms TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:04:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-06-12 20:04:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2631. [2021-06-12 20:04:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 2.8456273764258557) internal successors, (7484), 2630 states have internal predecessors, (7484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:12,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 7484 transitions. [2021-06-12 20:04:12,382 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 7484 transitions. Word has length 19 [2021-06-12 20:04:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:12,382 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 7484 transitions. [2021-06-12 20:04:12,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 7484 transitions. [2021-06-12 20:04:12,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:12,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:12,384 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:12,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4444,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:12,585 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:12,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:12,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1967360318, now seen corresponding path program 592 times [2021-06-12 20:04:12,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279494841] [2021-06-12 20:04:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:12,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279494841] [2021-06-12 20:04:12,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279494841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987622553] [2021-06-12 20:04:12,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:12,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:12,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:12,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:12,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:12,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:12,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:12,877 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:12,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:12,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:12,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:12,915 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:12,915 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:12,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:12,916 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:12,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987622553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:12,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:12,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:12,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770855006] [2021-06-12 20:04:12,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:12,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:12,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:12,970 INFO L87 Difference]: Start difference. First operand 2631 states and 7484 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:13,444 INFO L93 Difference]: Finished difference Result 2820 states and 7846 transitions. [2021-06-12 20:04:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:04:13,445 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:13,448 INFO L225 Difference]: With dead ends: 2820 [2021-06-12 20:04:13,448 INFO L226 Difference]: Without dead ends: 2820 [2021-06-12 20:04:13,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:04:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-12 20:04:13,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2619. [2021-06-12 20:04:13,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2618 states have (on average 2.8433919022154317) internal successors, (7444), 2618 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 7444 transitions. [2021-06-12 20:04:13,473 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 7444 transitions. Word has length 19 [2021-06-12 20:04:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:13,473 INFO L482 AbstractCegarLoop]: Abstraction has 2619 states and 7444 transitions. [2021-06-12 20:04:13,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 7444 transitions. [2021-06-12 20:04:13,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:13,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:13,475 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:13,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4450 [2021-06-12 20:04:13,691 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:13,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:13,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1648920354, now seen corresponding path program 593 times [2021-06-12 20:04:13,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:13,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239226229] [2021-06-12 20:04:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:13,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:13,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239226229] [2021-06-12 20:04:13,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239226229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:13,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181767122] [2021-06-12 20:04:13,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:13,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:13,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:14,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:14,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:14,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:14,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:14,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:14,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,058 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:14,059 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:14,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:14,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181767122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:14,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:14,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761571230] [2021-06-12 20:04:14,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:14,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:14,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:14,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:14,083 INFO L87 Difference]: Start difference. First operand 2619 states and 7444 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:14,491 INFO L93 Difference]: Finished difference Result 2878 states and 8003 transitions. [2021-06-12 20:04:14,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:04:14,492 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:14,495 INFO L225 Difference]: With dead ends: 2878 [2021-06-12 20:04:14,495 INFO L226 Difference]: Without dead ends: 2878 [2021-06-12 20:04:14,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2021-06-12 20:04:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2640. [2021-06-12 20:04:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 2.843501326259947) internal successors, (7504), 2639 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 7504 transitions. [2021-06-12 20:04:14,526 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 7504 transitions. Word has length 19 [2021-06-12 20:04:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:14,526 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 7504 transitions. [2021-06-12 20:04:14,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 7504 transitions. [2021-06-12 20:04:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:14,529 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:14,529 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:14,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4454,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:14,734 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:14,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1715164354, now seen corresponding path program 594 times [2021-06-12 20:04:14,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:14,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497301707] [2021-06-12 20:04:14,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:14,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:14,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497301707] [2021-06-12 20:04:14,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497301707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:14,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231562829] [2021-06-12 20:04:14,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:14,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:14,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:14,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:14,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:15,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:15,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:15,073 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:15,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:15,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:15,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:15,083 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:15,086 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:15,114 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:15,115 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:15,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:15,116 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:15,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231562829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:15,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:15,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865932762] [2021-06-12 20:04:15,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:15,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:15,145 INFO L87 Difference]: Start difference. First operand 2640 states and 7504 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:15,795 INFO L93 Difference]: Finished difference Result 2788 states and 7799 transitions. [2021-06-12 20:04:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:04:15,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:15,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:15,798 INFO L225 Difference]: With dead ends: 2788 [2021-06-12 20:04:15,798 INFO L226 Difference]: Without dead ends: 2780 [2021-06-12 20:04:15,798 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:04:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-06-12 20:04:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2643. [2021-06-12 20:04:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.841029523088569) internal successors, (7506), 2642 states have internal predecessors, (7506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 7506 transitions. [2021-06-12 20:04:15,825 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 7506 transitions. Word has length 19 [2021-06-12 20:04:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:15,825 INFO L482 AbstractCegarLoop]: Abstraction has 2643 states and 7506 transitions. [2021-06-12 20:04:15,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 7506 transitions. [2021-06-12 20:04:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:15,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:15,828 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:16,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4457,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:16,041 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:16,041 INFO L82 PathProgramCache]: Analyzing trace with hash 487898240, now seen corresponding path program 595 times [2021-06-12 20:04:16,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:16,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762178205] [2021-06-12 20:04:16,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:16,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:16,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762178205] [2021-06-12 20:04:16,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762178205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:16,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361793976] [2021-06-12 20:04:16,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:16,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:16,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:16,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:16,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:16,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,377 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:16,377 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:16,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:16,378 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:16,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361793976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:16,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:16,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:16,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277516638] [2021-06-12 20:04:16,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:16,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:16,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:16,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:16,402 INFO L87 Difference]: Start difference. First operand 2643 states and 7506 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:17,577 INFO L93 Difference]: Finished difference Result 2992 states and 8230 transitions. [2021-06-12 20:04:17,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:04:17,578 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:17,581 INFO L225 Difference]: With dead ends: 2992 [2021-06-12 20:04:17,581 INFO L226 Difference]: Without dead ends: 2992 [2021-06-12 20:04:17,581 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 918.7ms TimeCoverageRelationStatistics Valid=260, Invalid=1996, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:04:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2021-06-12 20:04:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2643. [2021-06-12 20:04:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.842543527630583) internal successors, (7510), 2642 states have internal predecessors, (7510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 7510 transitions. [2021-06-12 20:04:17,644 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 7510 transitions. Word has length 19 [2021-06-12 20:04:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:17,644 INFO L482 AbstractCegarLoop]: Abstraction has 2643 states and 7510 transitions. [2021-06-12 20:04:17,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 7510 transitions. [2021-06-12 20:04:17,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:17,647 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:17,647 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:17,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4464 [2021-06-12 20:04:17,857 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2041947364, now seen corresponding path program 596 times [2021-06-12 20:04:17,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:17,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634248398] [2021-06-12 20:04:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:17,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:17,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634248398] [2021-06-12 20:04:17,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634248398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:17,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366242049] [2021-06-12 20:04:17,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:18,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:18,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:18,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:18,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:18,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:18,273 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:18,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:18,276 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:18,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:18,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:18,311 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:18,311 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:18,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:18,312 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:18,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366242049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:18,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:18,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:18,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276265742] [2021-06-12 20:04:18,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:18,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:18,347 INFO L87 Difference]: Start difference. First operand 2643 states and 7510 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:19,117 INFO L93 Difference]: Finished difference Result 2795 states and 7814 transitions. [2021-06-12 20:04:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:04:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:19,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:19,121 INFO L225 Difference]: With dead ends: 2795 [2021-06-12 20:04:19,121 INFO L226 Difference]: Without dead ends: 2789 [2021-06-12 20:04:19,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:04:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-06-12 20:04:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2645. [2021-06-12 20:04:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 2.8419062027231465) internal successors, (7514), 2644 states have internal predecessors, (7514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 7514 transitions. [2021-06-12 20:04:19,150 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 7514 transitions. Word has length 19 [2021-06-12 20:04:19,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:19,150 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 7514 transitions. [2021-06-12 20:04:19,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 7514 transitions. [2021-06-12 20:04:19,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:19,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:19,153 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:19,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4467,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:19,370 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash 727540578, now seen corresponding path program 597 times [2021-06-12 20:04:19,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:19,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561886624] [2021-06-12 20:04:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:19,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561886624] [2021-06-12 20:04:19,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561886624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245977427] [2021-06-12 20:04:19,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:19,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:04:19,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:19,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:19,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:19,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:19,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:19,684 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,706 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:19,707 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:19,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:19,708 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:19,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245977427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:19,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:19,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:19,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137166145] [2021-06-12 20:04:19,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:19,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:19,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:19,731 INFO L87 Difference]: Start difference. First operand 2645 states and 7514 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:20,795 INFO L93 Difference]: Finished difference Result 2917 states and 8065 transitions. [2021-06-12 20:04:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:04:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:20,799 INFO L225 Difference]: With dead ends: 2917 [2021-06-12 20:04:20,799 INFO L226 Difference]: Without dead ends: 2917 [2021-06-12 20:04:20,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 785.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:04:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-12 20:04:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2633. [2021-06-12 20:04:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2633 states, 2632 states have (on average 2.8404255319148937) internal successors, (7476), 2632 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2633 states to 2633 states and 7476 transitions. [2021-06-12 20:04:20,829 INFO L78 Accepts]: Start accepts. Automaton has 2633 states and 7476 transitions. Word has length 19 [2021-06-12 20:04:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:20,829 INFO L482 AbstractCegarLoop]: Abstraction has 2633 states and 7476 transitions. [2021-06-12 20:04:20,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2633 states and 7476 transitions. [2021-06-12 20:04:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:20,832 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:20,832 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:21,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 602 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4474 [2021-06-12 20:04:21,045 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:21,045 INFO L82 PathProgramCache]: Analyzing trace with hash -192160130, now seen corresponding path program 598 times [2021-06-12 20:04:21,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:21,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417224923] [2021-06-12 20:04:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:21,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:21,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417224923] [2021-06-12 20:04:21,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417224923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:21,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806209949] [2021-06-12 20:04:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:21,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:21,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:21,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:21,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:21,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:21,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:21,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:21,413 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:21,416 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:21,420 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:21,456 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:21,456 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:21,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:21,457 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:21,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806209949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:21,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:21,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:21,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733564968] [2021-06-12 20:04:21,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:21,492 INFO L87 Difference]: Start difference. First operand 2633 states and 7476 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:22,123 INFO L93 Difference]: Finished difference Result 2741 states and 7725 transitions. [2021-06-12 20:04:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:04:22,123 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:22,126 INFO L225 Difference]: With dead ends: 2741 [2021-06-12 20:04:22,126 INFO L226 Difference]: Without dead ends: 2736 [2021-06-12 20:04:22,126 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:04:22,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-12 20:04:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2635. [2021-06-12 20:04:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 2634 states have (on average 2.8390280941533788) internal successors, (7478), 2634 states have internal predecessors, (7478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 7478 transitions. [2021-06-12 20:04:22,152 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 7478 transitions. Word has length 19 [2021-06-12 20:04:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:22,152 INFO L482 AbstractCegarLoop]: Abstraction has 2635 states and 7478 transitions. [2021-06-12 20:04:22,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:22,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 7478 transitions. [2021-06-12 20:04:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:22,155 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:22,155 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:22,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4477,603 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:22,371 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:22,371 INFO L82 PathProgramCache]: Analyzing trace with hash 735270976, now seen corresponding path program 599 times [2021-06-12 20:04:22,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:22,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275711738] [2021-06-12 20:04:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:22,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:22,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275711738] [2021-06-12 20:04:22,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275711738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60005801] [2021-06-12 20:04:22,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:22,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:04:22,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:22,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:22,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:22,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:22,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:22,663 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:22,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:22,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:22,669 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:22,701 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:22,701 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:22,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:22,702 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:22,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60005801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:22,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:22,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:22,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539057911] [2021-06-12 20:04:22,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:22,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:22,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:22,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:22,757 INFO L87 Difference]: Start difference. First operand 2635 states and 7478 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:23,539 INFO L93 Difference]: Finished difference Result 2939 states and 8138 transitions. [2021-06-12 20:04:23,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:04:23,539 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:23,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:23,542 INFO L225 Difference]: With dead ends: 2939 [2021-06-12 20:04:23,542 INFO L226 Difference]: Without dead ends: 2938 [2021-06-12 20:04:23,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:04:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-06-12 20:04:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2627. [2021-06-12 20:04:23,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.837014470677837) internal successors, (7450), 2626 states have internal predecessors, (7450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 7450 transitions. [2021-06-12 20:04:23,575 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 7450 transitions. Word has length 19 [2021-06-12 20:04:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:23,575 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 7450 transitions. [2021-06-12 20:04:23,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 7450 transitions. [2021-06-12 20:04:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:23,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:23,578 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:23,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4484,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:23,794 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1536887204, now seen corresponding path program 600 times [2021-06-12 20:04:23,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:23,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512690594] [2021-06-12 20:04:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:23,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:23,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512690594] [2021-06-12 20:04:23,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512690594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:23,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397627825] [2021-06-12 20:04:23,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:23,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:04:23,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:23,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:24,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:24,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:24,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:24,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:24,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:24,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:24,163 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:24,164 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:24,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:24,164 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:24,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397627825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:24,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:24,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405524827] [2021-06-12 20:04:24,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:24,235 INFO L87 Difference]: Start difference. First operand 2627 states and 7450 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:25,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:25,211 INFO L93 Difference]: Finished difference Result 2856 states and 7924 transitions. [2021-06-12 20:04:25,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:04:25,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:25,215 INFO L225 Difference]: With dead ends: 2856 [2021-06-12 20:04:25,215 INFO L226 Difference]: Without dead ends: 2852 [2021-06-12 20:04:25,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:04:25,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-06-12 20:04:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 2647. [2021-06-12 20:04:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2646 states have (on average 2.8412698412698414) internal successors, (7518), 2646 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 7518 transitions. [2021-06-12 20:04:25,244 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 7518 transitions. Word has length 19 [2021-06-12 20:04:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:25,245 INFO L482 AbstractCegarLoop]: Abstraction has 2647 states and 7518 transitions. [2021-06-12 20:04:25,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 7518 transitions. [2021-06-12 20:04:25,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:25,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:25,247 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:25,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4488,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:25,463 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:25,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:25,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1039736386, now seen corresponding path program 601 times [2021-06-12 20:04:25,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:25,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250090226] [2021-06-12 20:04:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:25,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250090226] [2021-06-12 20:04:25,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250090226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905815160] [2021-06-12 20:04:25,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:25,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:25,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:25,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:25,772 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:25,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:25,775 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:25,827 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:25,828 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:25,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:25,828 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:25,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905815160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:25,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:25,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:25,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781005649] [2021-06-12 20:04:25,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:25,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:25,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:25,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:25,885 INFO L87 Difference]: Start difference. First operand 2647 states and 7518 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:26,584 INFO L93 Difference]: Finished difference Result 2846 states and 7910 transitions. [2021-06-12 20:04:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:04:26,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:26,588 INFO L225 Difference]: With dead ends: 2846 [2021-06-12 20:04:26,588 INFO L226 Difference]: Without dead ends: 2846 [2021-06-12 20:04:26,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 566.2ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:04:26,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-12 20:04:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2620. [2021-06-12 20:04:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 2.8381061473844977) internal successors, (7433), 2619 states have internal predecessors, (7433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 7433 transitions. [2021-06-12 20:04:26,616 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 7433 transitions. Word has length 19 [2021-06-12 20:04:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:26,616 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 7433 transitions. [2021-06-12 20:04:26,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 7433 transitions. [2021-06-12 20:04:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:26,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:26,619 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:26,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4494 [2021-06-12 20:04:26,835 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash 714264768, now seen corresponding path program 602 times [2021-06-12 20:04:26,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:26,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816066399] [2021-06-12 20:04:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:04:26,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:26,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816066399] [2021-06-12 20:04:26,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816066399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:26,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981073383] [2021-06-12 20:04:26,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:26,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:26,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:26,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:26,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:27,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:27,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:27,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:27,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:27,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:27,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:27,112 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:27,112 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:27,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:27,113 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:27,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981073383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:27,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:27,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 20:04:27,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474375145] [2021-06-12 20:04:27,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:04:27,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:27,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:04:27,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:27,166 INFO L87 Difference]: Start difference. First operand 2620 states and 7433 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:28,218 INFO L93 Difference]: Finished difference Result 2865 states and 7971 transitions. [2021-06-12 20:04:28,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 20:04:28,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:28,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:28,221 INFO L225 Difference]: With dead ends: 2865 [2021-06-12 20:04:28,221 INFO L226 Difference]: Without dead ends: 2863 [2021-06-12 20:04:28,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:04:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2021-06-12 20:04:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2641. [2021-06-12 20:04:28,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2640 states have (on average 2.8401515151515153) internal successors, (7498), 2640 states have internal predecessors, (7498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 7498 transitions. [2021-06-12 20:04:28,253 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 7498 transitions. Word has length 19 [2021-06-12 20:04:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:28,253 INFO L482 AbstractCegarLoop]: Abstraction has 2641 states and 7498 transitions. [2021-06-12 20:04:28,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:28,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 7498 transitions. [2021-06-12 20:04:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:28,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:28,255 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:28,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4498,607 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:28,465 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1060742594, now seen corresponding path program 603 times [2021-06-12 20:04:28,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:28,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10209730] [2021-06-12 20:04:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:04:28,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10209730] [2021-06-12 20:04:28,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10209730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:28,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429728911] [2021-06-12 20:04:28,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:28,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:28,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:28,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:28,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:28,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:28,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:28,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:28,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:28,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:28,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:28,753 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:28,753 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:28,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:28,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429728911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:28,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:28,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-12 20:04:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486364898] [2021-06-12 20:04:28,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:04:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:04:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:04:28,810 INFO L87 Difference]: Start difference. First operand 2641 states and 7498 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:29,518 INFO L93 Difference]: Finished difference Result 2868 states and 7983 transitions. [2021-06-12 20:04:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:04:29,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:29,521 INFO L225 Difference]: With dead ends: 2868 [2021-06-12 20:04:29,521 INFO L226 Difference]: Without dead ends: 2868 [2021-06-12 20:04:29,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:04:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2021-06-12 20:04:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2641. [2021-06-12 20:04:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 2640 states have (on average 2.8401515151515153) internal successors, (7498), 2640 states have internal predecessors, (7498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 7498 transitions. [2021-06-12 20:04:29,551 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 7498 transitions. Word has length 19 [2021-06-12 20:04:29,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:29,551 INFO L482 AbstractCegarLoop]: Abstraction has 2641 states and 7498 transitions. [2021-06-12 20:04:29,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:29,551 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 7498 transitions. [2021-06-12 20:04:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:29,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:29,553 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:29,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4502,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:29,769 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:29,770 INFO L82 PathProgramCache]: Analyzing trace with hash -163294208, now seen corresponding path program 604 times [2021-06-12 20:04:29,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:29,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548271172] [2021-06-12 20:04:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:29,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:29,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:29,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548271172] [2021-06-12 20:04:29,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548271172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:29,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645879332] [2021-06-12 20:04:29,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:29,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:30,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:30,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:30,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:30,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,116 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:30,116 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:30,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:30,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645879332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:30,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:30,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553384571] [2021-06-12 20:04:30,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:30,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:30,138 INFO L87 Difference]: Start difference. First operand 2641 states and 7498 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:30,523 INFO L93 Difference]: Finished difference Result 2943 states and 8179 transitions. [2021-06-12 20:04:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:04:30,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:30,526 INFO L225 Difference]: With dead ends: 2943 [2021-06-12 20:04:30,526 INFO L226 Difference]: Without dead ends: 2943 [2021-06-12 20:04:30,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:04:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2943 states. [2021-06-12 20:04:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2943 to 2653. [2021-06-12 20:04:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.842006033182504) internal successors, (7537), 2652 states have internal predecessors, (7537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 7537 transitions. [2021-06-12 20:04:30,552 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 7537 transitions. Word has length 19 [2021-06-12 20:04:30,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:30,552 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 7537 transitions. [2021-06-12 20:04:30,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 7537 transitions. [2021-06-12 20:04:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:30,554 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:30,554 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:30,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4506 [2021-06-12 20:04:30,755 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1390754916, now seen corresponding path program 605 times [2021-06-12 20:04:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:30,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795746104] [2021-06-12 20:04:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:30,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:30,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:30,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795746104] [2021-06-12 20:04:30,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795746104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:30,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154552210] [2021-06-12 20:04:30,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:30,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:30,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:30,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:30,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:31,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:31,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:31,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:31,056 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:31,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:31,059 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:31,062 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:31,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:31,096 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:31,096 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:31,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:31,097 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:31,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154552210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:31,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:31,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:31,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225558672] [2021-06-12 20:04:31,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:31,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:31,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:31,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:31,126 INFO L87 Difference]: Start difference. First operand 2653 states and 7537 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:31,804 INFO L93 Difference]: Finished difference Result 2806 states and 7847 transitions. [2021-06-12 20:04:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:04:31,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:31,808 INFO L225 Difference]: With dead ends: 2806 [2021-06-12 20:04:31,808 INFO L226 Difference]: Without dead ends: 2800 [2021-06-12 20:04:31,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:04:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-06-12 20:04:31,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2654. [2021-06-12 20:04:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 2.838673200150773) internal successors, (7531), 2653 states have internal predecessors, (7531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 7531 transitions. [2021-06-12 20:04:31,845 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 7531 transitions. Word has length 19 [2021-06-12 20:04:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:31,845 INFO L482 AbstractCegarLoop]: Abstraction has 2654 states and 7531 transitions. [2021-06-12 20:04:31,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 7531 transitions. [2021-06-12 20:04:31,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:31,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:31,848 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:32,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4509,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:32,061 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:32,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:32,061 INFO L82 PathProgramCache]: Analyzing trace with hash 76348130, now seen corresponding path program 606 times [2021-06-12 20:04:32,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:32,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826104210] [2021-06-12 20:04:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:32,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826104210] [2021-06-12 20:04:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826104210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283869296] [2021-06-12 20:04:32,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:32,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:04:32,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:32,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:32,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:32,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:32,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,383 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:32,383 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:32,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:32,384 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:32,404 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:32,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283869296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:32,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:32,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:32,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208941670] [2021-06-12 20:04:32,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:32,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:32,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:32,405 INFO L87 Difference]: Start difference. First operand 2654 states and 7531 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:33,228 INFO L93 Difference]: Finished difference Result 2903 states and 8020 transitions. [2021-06-12 20:04:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:04:33,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:33,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:33,231 INFO L225 Difference]: With dead ends: 2903 [2021-06-12 20:04:33,231 INFO L226 Difference]: Without dead ends: 2897 [2021-06-12 20:04:33,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:04:33,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-06-12 20:04:33,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2620. [2021-06-12 20:04:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 2.8270332187857963) internal successors, (7404), 2619 states have internal predecessors, (7404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 7404 transitions. [2021-06-12 20:04:33,259 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 7404 transitions. Word has length 19 [2021-06-12 20:04:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:33,259 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 7404 transitions. [2021-06-12 20:04:33,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 7404 transitions. [2021-06-12 20:04:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:33,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:33,262 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:33,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4516 [2021-06-12 20:04:33,462 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -843352578, now seen corresponding path program 607 times [2021-06-12 20:04:33,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:33,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045692146] [2021-06-12 20:04:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:33,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:33,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045692146] [2021-06-12 20:04:33,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045692146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812736120] [2021-06-12 20:04:33,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:33,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:33,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:33,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:33,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:33,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:33,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:33,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:33,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:33,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:33,777 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:33,806 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:33,806 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:33,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:33,807 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:33,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812736120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:33,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:33,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:33,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495235157] [2021-06-12 20:04:33,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:33,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:33,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:33,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:33,835 INFO L87 Difference]: Start difference. First operand 2620 states and 7404 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:34,621 INFO L93 Difference]: Finished difference Result 2760 states and 7697 transitions. [2021-06-12 20:04:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:04:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:34,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:34,625 INFO L225 Difference]: With dead ends: 2760 [2021-06-12 20:04:34,625 INFO L226 Difference]: Without dead ends: 2756 [2021-06-12 20:04:34,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 603.6ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:04:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-06-12 20:04:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2620. [2021-06-12 20:04:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2619 states have (on average 2.8232149675448643) internal successors, (7394), 2619 states have internal predecessors, (7394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 7394 transitions. [2021-06-12 20:04:34,652 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 7394 transitions. Word has length 19 [2021-06-12 20:04:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:34,652 INFO L482 AbstractCegarLoop]: Abstraction has 2620 states and 7394 transitions. [2021-06-12 20:04:34,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 7394 transitions. [2021-06-12 20:04:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:34,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:34,655 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:34,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4519 [2021-06-12 20:04:34,861 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 885694756, now seen corresponding path program 608 times [2021-06-12 20:04:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:34,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782980829] [2021-06-12 20:04:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:34,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:34,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782980829] [2021-06-12 20:04:34,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782980829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:34,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943065697] [2021-06-12 20:04:34,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:34,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:34,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:34,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:34,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:35,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:35,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:35,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:35,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:35,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:35,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:35,178 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:35,178 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:35,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:35,179 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:35,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943065697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:35,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:35,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:35,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325262720] [2021-06-12 20:04:35,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:35,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:35,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:35,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:35,256 INFO L87 Difference]: Start difference. First operand 2620 states and 7394 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:36,427 INFO L93 Difference]: Finished difference Result 2828 states and 7823 transitions. [2021-06-12 20:04:36,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:04:36,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:36,430 INFO L225 Difference]: With dead ends: 2828 [2021-06-12 20:04:36,430 INFO L226 Difference]: Without dead ends: 2824 [2021-06-12 20:04:36,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 952.0ms TimeCoverageRelationStatistics Valid=233, Invalid=2023, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:04:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2824 states. [2021-06-12 20:04:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2824 to 2619. [2021-06-12 20:04:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2619 states, 2618 states have (on average 2.820855614973262) internal successors, (7385), 2618 states have internal predecessors, (7385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2619 states to 2619 states and 7385 transitions. [2021-06-12 20:04:36,456 INFO L78 Accepts]: Start accepts. Automaton has 2619 states and 7385 transitions. Word has length 19 [2021-06-12 20:04:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:36,456 INFO L482 AbstractCegarLoop]: Abstraction has 2619 states and 7385 transitions. [2021-06-12 20:04:36,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2619 states and 7385 transitions. [2021-06-12 20:04:36,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:36,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:36,458 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:36,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4526,613 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:36,659 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:36,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1690928834, now seen corresponding path program 609 times [2021-06-12 20:04:36,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:36,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81448780] [2021-06-12 20:04:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:36,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:36,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81448780] [2021-06-12 20:04:36,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81448780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:36,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275545459] [2021-06-12 20:04:36,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:36,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:36,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:36,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:36,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:36,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:36,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:36,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:36,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:36,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:36,977 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:36,978 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:36,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:36,978 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:37,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275545459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:37,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:37,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:37,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200854289] [2021-06-12 20:04:37,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:37,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:37,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:37,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:37,040 INFO L87 Difference]: Start difference. First operand 2619 states and 7385 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:37,733 INFO L93 Difference]: Finished difference Result 2804 states and 7789 transitions. [2021-06-12 20:04:37,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:04:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:37,736 INFO L225 Difference]: With dead ends: 2804 [2021-06-12 20:04:37,736 INFO L226 Difference]: Without dead ends: 2804 [2021-06-12 20:04:37,736 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 631.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:04:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-12 20:04:37,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2612. [2021-06-12 20:04:37,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2611 states have (on average 2.8203753351206435) internal successors, (7364), 2611 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 7364 transitions. [2021-06-12 20:04:37,765 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 7364 transitions. Word has length 19 [2021-06-12 20:04:37,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:37,765 INFO L482 AbstractCegarLoop]: Abstraction has 2612 states and 7364 transitions. [2021-06-12 20:04:37,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 7364 transitions. [2021-06-12 20:04:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:37,767 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:37,767 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:37,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4532,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:37,977 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash 55341922, now seen corresponding path program 610 times [2021-06-12 20:04:37,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:37,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363145889] [2021-06-12 20:04:37,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:38,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:38,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363145889] [2021-06-12 20:04:38,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363145889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:38,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216685532] [2021-06-12 20:04:38,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:38,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:38,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:38,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:38,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:38,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:38,290 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,315 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:38,315 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:38,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:38,316 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:38,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216685532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:38,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:38,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:38,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721500087] [2021-06-12 20:04:38,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:38,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:38,340 INFO L87 Difference]: Start difference. First operand 2612 states and 7364 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:38,969 INFO L93 Difference]: Finished difference Result 3001 states and 8223 transitions. [2021-06-12 20:04:38,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:04:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:38,973 INFO L225 Difference]: With dead ends: 3001 [2021-06-12 20:04:38,973 INFO L226 Difference]: Without dead ends: 3001 [2021-06-12 20:04:38,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:04:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-12 20:04:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2649. [2021-06-12 20:04:39,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 2.828549848942598) internal successors, (7490), 2648 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 7490 transitions. [2021-06-12 20:04:39,004 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 7490 transitions. Word has length 19 [2021-06-12 20:04:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:39,004 INFO L482 AbstractCegarLoop]: Abstraction has 2649 states and 7490 transitions. [2021-06-12 20:04:39,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 7490 transitions. [2021-06-12 20:04:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:39,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:39,007 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:39,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4536,615 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:39,223 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:39,223 INFO L82 PathProgramCache]: Analyzing trace with hash -864358786, now seen corresponding path program 611 times [2021-06-12 20:04:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:39,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684255972] [2021-06-12 20:04:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:39,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:39,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684255972] [2021-06-12 20:04:39,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684255972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695351661] [2021-06-12 20:04:39,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:39,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:04:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:39,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:39,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:39,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:39,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:39,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:39,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:39,543 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:39,546 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:39,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:39,578 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:39,578 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:39,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:39,579 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:39,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:39,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695351661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:39,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:39,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:39,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567522515] [2021-06-12 20:04:39,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:39,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:39,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:39,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:39,607 INFO L87 Difference]: Start difference. First operand 2649 states and 7490 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:40,370 INFO L93 Difference]: Finished difference Result 2821 states and 7828 transitions. [2021-06-12 20:04:40,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:04:40,371 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:40,374 INFO L225 Difference]: With dead ends: 2821 [2021-06-12 20:04:40,374 INFO L226 Difference]: Without dead ends: 2817 [2021-06-12 20:04:40,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 612.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:04:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2021-06-12 20:04:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2649. [2021-06-12 20:04:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 2.823262839879154) internal successors, (7476), 2648 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 7476 transitions. [2021-06-12 20:04:40,400 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 7476 transitions. Word has length 19 [2021-06-12 20:04:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:40,400 INFO L482 AbstractCegarLoop]: Abstraction has 2649 states and 7476 transitions. [2021-06-12 20:04:40,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 7476 transitions. [2021-06-12 20:04:40,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:40,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:40,403 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:40,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4539,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:40,603 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash 63072320, now seen corresponding path program 612 times [2021-06-12 20:04:40,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:40,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963134603] [2021-06-12 20:04:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:40,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:40,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963134603] [2021-06-12 20:04:40,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963134603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800905526] [2021-06-12 20:04:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:40,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:04:40,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:40,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:40,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:40,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:40,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:40,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:40,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:40,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:40,841 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:40,873 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:40,873 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:40,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:40,874 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:40,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800905526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:40,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:40,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:40,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959551892] [2021-06-12 20:04:40,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:40,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:40,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:40,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:40,941 INFO L87 Difference]: Start difference. First operand 2649 states and 7476 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:41,790 INFO L93 Difference]: Finished difference Result 2972 states and 8114 transitions. [2021-06-12 20:04:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:04:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:41,794 INFO L225 Difference]: With dead ends: 2972 [2021-06-12 20:04:41,794 INFO L226 Difference]: Without dead ends: 2970 [2021-06-12 20:04:41,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=188, Invalid=1372, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:04:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-06-12 20:04:41,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2653. [2021-06-12 20:04:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2653 states, 2652 states have (on average 2.8220211161387634) internal successors, (7484), 2652 states have internal predecessors, (7484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2653 states to 2653 states and 7484 transitions. [2021-06-12 20:04:41,823 INFO L78 Accepts]: Start accepts. Automaton has 2653 states and 7484 transitions. Word has length 19 [2021-06-12 20:04:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:41,823 INFO L482 AbstractCegarLoop]: Abstraction has 2653 states and 7484 transitions. [2021-06-12 20:04:41,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2653 states and 7484 transitions. [2021-06-12 20:04:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:41,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:41,825 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:42,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4546 [2021-06-12 20:04:42,041 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:42,042 INFO L82 PathProgramCache]: Analyzing trace with hash 864688548, now seen corresponding path program 613 times [2021-06-12 20:04:42,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:42,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466917571] [2021-06-12 20:04:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:42,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466917571] [2021-06-12 20:04:42,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466917571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:42,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970579697] [2021-06-12 20:04:42,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:42,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:42,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:42,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:42,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:42,295 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:42,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:42,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:42,329 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:42,330 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:42,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:42,330 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:42,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970579697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:42,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:42,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:42,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110580936] [2021-06-12 20:04:42,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:42,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:42,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:42,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:42,401 INFO L87 Difference]: Start difference. First operand 2653 states and 7484 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:43,679 INFO L93 Difference]: Finished difference Result 2938 states and 8058 transitions. [2021-06-12 20:04:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 20:04:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:43,682 INFO L225 Difference]: With dead ends: 2938 [2021-06-12 20:04:43,682 INFO L226 Difference]: Without dead ends: 2934 [2021-06-12 20:04:43,682 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=268, Invalid=2594, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:04:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-12 20:04:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2668. [2021-06-12 20:04:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 2.8211473565804273) internal successors, (7524), 2667 states have internal predecessors, (7524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 7524 transitions. [2021-06-12 20:04:43,708 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 7524 transitions. Word has length 19 [2021-06-12 20:04:43,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:43,708 INFO L482 AbstractCegarLoop]: Abstraction has 2668 states and 7524 transitions. [2021-06-12 20:04:43,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 7524 transitions. [2021-06-12 20:04:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:43,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:43,711 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:43,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 618 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-06-12 20:04:43,911 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:43,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1711935042, now seen corresponding path program 614 times [2021-06-12 20:04:43,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:43,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954822191] [2021-06-12 20:04:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:44,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:44,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954822191] [2021-06-12 20:04:44,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954822191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:44,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328731525] [2021-06-12 20:04:44,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:44,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:44,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:44,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:44,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:44,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:44,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:44,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:44,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:44,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:44,182 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:44,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:44,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:44,183 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:44,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328731525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:44,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:44,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-12 20:04:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78440292] [2021-06-12 20:04:44,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:04:44,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:44,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:04:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:04:44,236 INFO L87 Difference]: Start difference. First operand 2668 states and 7524 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:44,987 INFO L93 Difference]: Finished difference Result 2921 states and 8032 transitions. [2021-06-12 20:04:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:04:44,987 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:44,990 INFO L225 Difference]: With dead ends: 2921 [2021-06-12 20:04:44,990 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 20:04:44,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:04:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 20:04:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2647. [2021-06-12 20:04:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2647 states, 2646 states have (on average 2.814436885865457) internal successors, (7447), 2646 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 7447 transitions. [2021-06-12 20:04:45,017 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 7447 transitions. Word has length 19 [2021-06-12 20:04:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:45,017 INFO L482 AbstractCegarLoop]: Abstraction has 2647 states and 7447 transitions. [2021-06-12 20:04:45,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 7447 transitions. [2021-06-12 20:04:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:45,020 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:45,020 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:45,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4556 [2021-06-12 20:04:45,220 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash -353247296, now seen corresponding path program 615 times [2021-06-12 20:04:45,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:45,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769144782] [2021-06-12 20:04:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:45,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:45,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769144782] [2021-06-12 20:04:45,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769144782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:45,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754856269] [2021-06-12 20:04:45,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:45,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:04:45,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:45,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:45,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:45,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:45,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:45,504 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:45,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:45,507 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:45,539 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:45,540 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:45,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:45,540 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754856269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:45,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:45,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:45,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553157595] [2021-06-12 20:04:45,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:45,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:45,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:45,607 INFO L87 Difference]: Start difference. First operand 2647 states and 7447 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:46,544 INFO L93 Difference]: Finished difference Result 3078 states and 8406 transitions. [2021-06-12 20:04:46,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 20:04:46,544 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:46,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:46,547 INFO L225 Difference]: With dead ends: 3078 [2021-06-12 20:04:46,547 INFO L226 Difference]: Without dead ends: 3078 [2021-06-12 20:04:46,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:04:46,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-12 20:04:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2715. [2021-06-12 20:04:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 2.8290346352247604) internal successors, (7678), 2714 states have internal predecessors, (7678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 7678 transitions. [2021-06-12 20:04:46,576 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 7678 transitions. Word has length 19 [2021-06-12 20:04:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:46,576 INFO L482 AbstractCegarLoop]: Abstraction has 2715 states and 7678 transitions. [2021-06-12 20:04:46,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 7678 transitions. [2021-06-12 20:04:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:46,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:46,578 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:46,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4560,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:46,779 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:46,779 INFO L82 PathProgramCache]: Analyzing trace with hash 448368932, now seen corresponding path program 616 times [2021-06-12 20:04:46,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:46,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108550546] [2021-06-12 20:04:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:46,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:46,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108550546] [2021-06-12 20:04:46,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108550546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:46,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944115812] [2021-06-12 20:04:46,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:46,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:46,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:46,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:46,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:47,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:47,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:47,043 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:47,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:47,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:47,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:47,081 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:47,081 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:47,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:47,082 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:47,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944115812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:47,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:47,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:47,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786588047] [2021-06-12 20:04:47,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:47,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:47,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:47,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:47,147 INFO L87 Difference]: Start difference. First operand 2715 states and 7678 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:48,389 INFO L93 Difference]: Finished difference Result 3065 states and 8424 transitions. [2021-06-12 20:04:48,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 20:04:48,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:48,397 INFO L225 Difference]: With dead ends: 3065 [2021-06-12 20:04:48,397 INFO L226 Difference]: Without dead ends: 3055 [2021-06-12 20:04:48,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 991.7ms TimeCoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 20:04:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-06-12 20:04:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2750. [2021-06-12 20:04:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 2.8272098945070936) internal successors, (7772), 2749 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 7772 transitions. [2021-06-12 20:04:48,427 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 7772 transitions. Word has length 19 [2021-06-12 20:04:48,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:48,427 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 7772 transitions. [2021-06-12 20:04:48,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:48,427 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 7772 transitions. [2021-06-12 20:04:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:48,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:48,429 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:48,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4564,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:48,630 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash -2128254658, now seen corresponding path program 617 times [2021-06-12 20:04:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:48,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305150385] [2021-06-12 20:04:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:48,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:48,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305150385] [2021-06-12 20:04:48,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305150385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:48,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013751747] [2021-06-12 20:04:48,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:48,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:04:48,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:48,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:48,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:48,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:48,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:48,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:48,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:48,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:48,939 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:04:48,940 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:48,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:04:48,940 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:04:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:48,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013751747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:48,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:48,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:48,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251388479] [2021-06-12 20:04:48,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:48,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:48,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:48,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:48,994 INFO L87 Difference]: Start difference. First operand 2750 states and 7772 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:49,726 INFO L93 Difference]: Finished difference Result 3061 states and 8413 transitions. [2021-06-12 20:04:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:04:49,726 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:49,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:49,729 INFO L225 Difference]: With dead ends: 3061 [2021-06-12 20:04:49,729 INFO L226 Difference]: Without dead ends: 3061 [2021-06-12 20:04:49,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:04:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3061 states. [2021-06-12 20:04:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3061 to 2746. [2021-06-12 20:04:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2746 states, 2745 states have (on average 2.822950819672131) internal successors, (7749), 2745 states have internal predecessors, (7749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2746 states to 2746 states and 7749 transitions. [2021-06-12 20:04:49,770 INFO L78 Accepts]: Start accepts. Automaton has 2746 states and 7749 transitions. Word has length 19 [2021-06-12 20:04:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:49,770 INFO L482 AbstractCegarLoop]: Abstraction has 2746 states and 7749 transitions. [2021-06-12 20:04:49,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2746 states and 7749 transitions. [2021-06-12 20:04:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:49,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:49,773 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:49,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4570,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:49,985 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:49,985 INFO L82 PathProgramCache]: Analyzing trace with hash 456099330, now seen corresponding path program 618 times [2021-06-12 20:04:49,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:49,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77994949] [2021-06-12 20:04:49,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:50,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:50,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77994949] [2021-06-12 20:04:50,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77994949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:50,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835299626] [2021-06-12 20:04:50,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:50,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:04:50,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:50,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:50,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:50,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:50,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:50,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:50,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,279 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:04:50,279 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:50,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:50,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:04:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:50,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835299626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:50,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:50,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691526713] [2021-06-12 20:04:50,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:50,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:50,304 INFO L87 Difference]: Start difference. First operand 2746 states and 7749 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:51,386 INFO L93 Difference]: Finished difference Result 3129 states and 8541 transitions. [2021-06-12 20:04:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 20:04:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:51,389 INFO L225 Difference]: With dead ends: 3129 [2021-06-12 20:04:51,389 INFO L226 Difference]: Without dead ends: 3129 [2021-06-12 20:04:51,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 782.6ms TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:04:51,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-06-12 20:04:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 2739. [2021-06-12 20:04:51,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 2.8206720233747262) internal successors, (7723), 2738 states have internal predecessors, (7723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 7723 transitions. [2021-06-12 20:04:51,418 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 7723 transitions. Word has length 19 [2021-06-12 20:04:51,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:51,418 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 7723 transitions. [2021-06-12 20:04:51,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:51,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 7723 transitions. [2021-06-12 20:04:51,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:51,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:51,420 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:51,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4574 [2021-06-12 20:04:51,621 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:51,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:51,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1033305666, now seen corresponding path program 619 times [2021-06-12 20:04:51,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:51,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313300847] [2021-06-12 20:04:51,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:51,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:51,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313300847] [2021-06-12 20:04:51,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313300847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:51,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904709605] [2021-06-12 20:04:51,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:51,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:51,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:51,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:51,884 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,900 INFO L628 ElimStorePlain]: treesize reduction 30, result has 33.3 percent of original size [2021-06-12 20:04:51,900 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:51,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:51,901 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:59, output treesize:15 [2021-06-12 20:04:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:51,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904709605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:51,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:51,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-12 20:04:51,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175691395] [2021-06-12 20:04:51,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:04:51,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:51,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:04:51,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:04:51,926 INFO L87 Difference]: Start difference. First operand 2739 states and 7723 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:52,463 INFO L93 Difference]: Finished difference Result 3049 states and 8363 transitions. [2021-06-12 20:04:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:04:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:52,467 INFO L225 Difference]: With dead ends: 3049 [2021-06-12 20:04:52,467 INFO L226 Difference]: Without dead ends: 3049 [2021-06-12 20:04:52,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:04:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-12 20:04:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2739. [2021-06-12 20:04:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2738 states have (on average 2.8206720233747262) internal successors, (7723), 2738 states have internal predecessors, (7723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 7723 transitions. [2021-06-12 20:04:52,497 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 7723 transitions. Word has length 19 [2021-06-12 20:04:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:52,497 INFO L482 AbstractCegarLoop]: Abstraction has 2739 states and 7723 transitions. [2021-06-12 20:04:52,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 7723 transitions. [2021-06-12 20:04:52,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:52,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:52,500 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:52,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4576,624 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:52,705 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1764477512, now seen corresponding path program 620 times [2021-06-12 20:04:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744770833] [2021-06-12 20:04:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:52,814 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:52,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:52,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744770833] [2021-06-12 20:04:52,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744770833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:52,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18120358] [2021-06-12 20:04:52,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:52,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:04:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:53,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:53,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:53,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,084 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:53,084 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:53,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:53,085 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:53,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18120358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:53,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:53,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:04:53,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899100543] [2021-06-12 20:04:53,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:04:53,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:53,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:04:53,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:53,112 INFO L87 Difference]: Start difference. First operand 2739 states and 7723 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:53,512 INFO L93 Difference]: Finished difference Result 2926 states and 8104 transitions. [2021-06-12 20:04:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:04:53,512 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:53,514 INFO L225 Difference]: With dead ends: 2926 [2021-06-12 20:04:53,515 INFO L226 Difference]: Without dead ends: 2926 [2021-06-12 20:04:53,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-12 20:04:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2792. [2021-06-12 20:04:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 2.8244356861340023) internal successors, (7883), 2791 states have internal predecessors, (7883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 7883 transitions. [2021-06-12 20:04:53,542 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 7883 transitions. Word has length 19 [2021-06-12 20:04:53,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:53,542 INFO L482 AbstractCegarLoop]: Abstraction has 2792 states and 7883 transitions. [2021-06-12 20:04:53,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 7883 transitions. [2021-06-12 20:04:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:53,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:53,544 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:53,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4578,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:53,745 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:53,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1323078940, now seen corresponding path program 621 times [2021-06-12 20:04:53,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:53,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867744134] [2021-06-12 20:04:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:53,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:53,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867744134] [2021-06-12 20:04:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867744134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:53,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802124617] [2021-06-12 20:04:53,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:53,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:04:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:53,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:54,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:54,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:54,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:54,113 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:54,116 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:54,119 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:54,126 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:54,157 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:54,157 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:54,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:54,158 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:54,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:54,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802124617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:54,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:54,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:04:54,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950089362] [2021-06-12 20:04:54,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:04:54,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:54,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:04:54,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:54,188 INFO L87 Difference]: Start difference. First operand 2792 states and 7883 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:54,856 INFO L93 Difference]: Finished difference Result 2902 states and 8039 transitions. [2021-06-12 20:04:54,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:04:54,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:54,859 INFO L225 Difference]: With dead ends: 2902 [2021-06-12 20:04:54,859 INFO L226 Difference]: Without dead ends: 2892 [2021-06-12 20:04:54,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:04:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-06-12 20:04:54,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2801. [2021-06-12 20:04:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2801 states, 2800 states have (on average 2.8192857142857144) internal successors, (7894), 2800 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2801 states to 2801 states and 7894 transitions. [2021-06-12 20:04:54,885 INFO L78 Accepts]: Start accepts. Automaton has 2801 states and 7894 transitions. Word has length 19 [2021-06-12 20:04:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:54,885 INFO L482 AbstractCegarLoop]: Abstraction has 2801 states and 7894 transitions. [2021-06-12 20:04:54,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2801 states and 7894 transitions. [2021-06-12 20:04:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:54,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:54,887 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:55,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4581 [2021-06-12 20:04:55,087 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:55,088 INFO L82 PathProgramCache]: Analyzing trace with hash 898542618, now seen corresponding path program 622 times [2021-06-12 20:04:55,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:55,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651843356] [2021-06-12 20:04:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:55,192 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:55,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:55,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651843356] [2021-06-12 20:04:55,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651843356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:55,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166219529] [2021-06-12 20:04:55,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:55,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:04:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:55,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:55,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:55,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:55,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:55,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:55,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,433 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:55,433 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:55,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:55,434 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:55,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166219529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:55,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:55,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:04:55,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391445162] [2021-06-12 20:04:55,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:04:55,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:55,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:04:55,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:55,457 INFO L87 Difference]: Start difference. First operand 2801 states and 7894 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:57,241 INFO L93 Difference]: Finished difference Result 3107 states and 8437 transitions. [2021-06-12 20:04:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 20:04:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:57,244 INFO L225 Difference]: With dead ends: 3107 [2021-06-12 20:04:57,244 INFO L226 Difference]: Without dead ends: 3107 [2021-06-12 20:04:57,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1468.7ms TimeCoverageRelationStatistics Valid=491, Invalid=4065, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 20:04:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-06-12 20:04:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2805. [2021-06-12 20:04:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.8223965763195435) internal successors, (7914), 2804 states have internal predecessors, (7914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 7914 transitions. [2021-06-12 20:04:57,271 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 7914 transitions. Word has length 19 [2021-06-12 20:04:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:57,272 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 7914 transitions. [2021-06-12 20:04:57,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 7914 transitions. [2021-06-12 20:04:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:57,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:57,274 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:57,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4588,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:57,474 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1829425206, now seen corresponding path program 623 times [2021-06-12 20:04:57,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:57,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020208844] [2021-06-12 20:04:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:57,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:57,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020208844] [2021-06-12 20:04:57,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020208844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:57,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104615741] [2021-06-12 20:04:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:57,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:04:57,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:57,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:57,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:57,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:57,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:57,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:04:57,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:57,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:57,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:04:57,842 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:04:57,845 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:57,874 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:04:57,874 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:57,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:04:57,875 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:04:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:57,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104615741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:57,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:57,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:04:57,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975002665] [2021-06-12 20:04:57,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:04:57,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:57,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:04:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:57,906 INFO L87 Difference]: Start difference. First operand 2805 states and 7914 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:04:58,750 INFO L93 Difference]: Finished difference Result 2926 states and 8083 transitions. [2021-06-12 20:04:58,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:04:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:04:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:04:58,753 INFO L225 Difference]: With dead ends: 2926 [2021-06-12 20:04:58,753 INFO L226 Difference]: Without dead ends: 2918 [2021-06-12 20:04:58,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 706.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1633, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:04:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2021-06-12 20:04:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2810. [2021-06-12 20:04:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2809 states have (on average 2.819864720541118) internal successors, (7921), 2809 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 7921 transitions. [2021-06-12 20:04:58,778 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 7921 transitions. Word has length 19 [2021-06-12 20:04:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:04:58,778 INFO L482 AbstractCegarLoop]: Abstraction has 2810 states and 7921 transitions. [2021-06-12 20:04:58,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:04:58,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 7921 transitions. [2021-06-12 20:04:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:04:58,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:04:58,780 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:04:58,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4591 [2021-06-12 20:04:58,981 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:04:58,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:04:58,981 INFO L82 PathProgramCache]: Analyzing trace with hash -262479496, now seen corresponding path program 624 times [2021-06-12 20:04:58,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:04:58,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336300859] [2021-06-12 20:04:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:04:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:04:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:59,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:04:59,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336300859] [2021-06-12 20:04:59,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336300859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:59,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136587005] [2021-06-12 20:04:59,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:04:59,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:04:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:04:59,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:04:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:04:59,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:04:59,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:04:59,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:04:59,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,327 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:04:59,327 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:04:59,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:04:59,328 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:04:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:04:59,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136587005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:04:59,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:04:59,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:04:59,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472572821] [2021-06-12 20:04:59,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:04:59,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:04:59,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:04:59,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:04:59,351 INFO L87 Difference]: Start difference. First operand 2810 states and 7921 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,640 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-06-12 20:05:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:01,816 INFO L93 Difference]: Finished difference Result 3224 states and 8680 transitions. [2021-06-12 20:05:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 20:05:01,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:01,819 INFO L225 Difference]: With dead ends: 3224 [2021-06-12 20:05:01,819 INFO L226 Difference]: Without dead ends: 3224 [2021-06-12 20:05:01,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1782.5ms TimeCoverageRelationStatistics Valid=505, Invalid=5045, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 20:05:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3224 states. [2021-06-12 20:05:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3224 to 2814. [2021-06-12 20:05:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2814 states, 2813 states have (on average 2.826875222182723) internal successors, (7952), 2813 states have internal predecessors, (7952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 7952 transitions. [2021-06-12 20:05:01,848 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 7952 transitions. Word has length 19 [2021-06-12 20:05:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 2814 states and 7952 transitions. [2021-06-12 20:05:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 7952 transitions. [2021-06-12 20:05:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:01,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:01,851 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:02,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4598,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:02,052 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:02,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1291569628, now seen corresponding path program 625 times [2021-06-12 20:05:02,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:02,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006550854] [2021-06-12 20:05:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:02,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:02,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006550854] [2021-06-12 20:05:02,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006550854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:02,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57129671] [2021-06-12 20:05:02,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:02,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:02,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:02,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:02,469 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:02,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:02,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:02,476 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:02,478 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:02,508 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:02,508 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:02,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:02,509 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:02,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57129671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:02,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:02,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:05:02,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850460888] [2021-06-12 20:05:02,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:05:02,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:02,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:05:02,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:02,544 INFO L87 Difference]: Start difference. First operand 2814 states and 7952 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:03,348 INFO L93 Difference]: Finished difference Result 2914 states and 8100 transitions. [2021-06-12 20:05:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:05:03,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:03,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:03,351 INFO L225 Difference]: With dead ends: 2914 [2021-06-12 20:05:03,351 INFO L226 Difference]: Without dead ends: 2908 [2021-06-12 20:05:03,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:05:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2908 states. [2021-06-12 20:05:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2908 to 2816. [2021-06-12 20:05:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2815 states have (on average 2.8259325044404973) internal successors, (7955), 2815 states have internal predecessors, (7955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 7955 transitions. [2021-06-12 20:05:03,392 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 7955 transitions. Word has length 19 [2021-06-12 20:05:03,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:03,392 INFO L482 AbstractCegarLoop]: Abstraction has 2816 states and 7955 transitions. [2021-06-12 20:05:03,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:03,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 7955 transitions. [2021-06-12 20:05:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:03,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:03,395 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:03,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4601,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:03,600 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:03,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:03,600 INFO L82 PathProgramCache]: Analyzing trace with hash -22837158, now seen corresponding path program 626 times [2021-06-12 20:05:03,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:03,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257078195] [2021-06-12 20:05:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:03,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257078195] [2021-06-12 20:05:03,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257078195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:03,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498960905] [2021-06-12 20:05:03,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:03,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:03,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:03,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:03,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:03,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:03,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:03,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:03,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:03,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,016 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:05:04,016 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:04,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:04,017 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:05:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:04,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498960905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:04,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:04,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:05:04,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006849206] [2021-06-12 20:05:04,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:05:04,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:04,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:05:04,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:04,041 INFO L87 Difference]: Start difference. First operand 2816 states and 7955 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:05,467 INFO L93 Difference]: Finished difference Result 3107 states and 8464 transitions. [2021-06-12 20:05:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 20:05:05,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:05,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:05,471 INFO L225 Difference]: With dead ends: 3107 [2021-06-12 20:05:05,471 INFO L226 Difference]: Without dead ends: 3107 [2021-06-12 20:05:05,471 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1076.4ms TimeCoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:05:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-06-12 20:05:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 2804. [2021-06-12 20:05:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 2.8273278630039242) internal successors, (7925), 2803 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:05,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 7925 transitions. [2021-06-12 20:05:05,501 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 7925 transitions. Word has length 19 [2021-06-12 20:05:05,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:05,501 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 7925 transitions. [2021-06-12 20:05:05,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:05,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 7925 transitions. [2021-06-12 20:05:05,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:05,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:05,504 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:05,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4608 [2021-06-12 20:05:05,713 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:05,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:05,713 INFO L82 PathProgramCache]: Analyzing trace with hash -942537866, now seen corresponding path program 627 times [2021-06-12 20:05:05,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:05,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426351530] [2021-06-12 20:05:05,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:05,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:05,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426351530] [2021-06-12 20:05:05,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426351530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:05,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044880057] [2021-06-12 20:05:05,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:05,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:05,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:06,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:06,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:06,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:06,107 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:06,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:06,110 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:06,113 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:06,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:06,146 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:06,146 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:06,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:06,147 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:06,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044880057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:06,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:06,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:05:06,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331428501] [2021-06-12 20:05:06,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:05:06,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:06,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:05:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:06,177 INFO L87 Difference]: Start difference. First operand 2804 states and 7925 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:06,760 INFO L93 Difference]: Finished difference Result 2846 states and 8000 transitions. [2021-06-12 20:05:06,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:05:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:06,764 INFO L225 Difference]: With dead ends: 2846 [2021-06-12 20:05:06,764 INFO L226 Difference]: Without dead ends: 2841 [2021-06-12 20:05:06,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 536.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:05:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-12 20:05:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2805. [2021-06-12 20:05:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2805 states, 2804 states have (on average 2.825962910128388) internal successors, (7924), 2804 states have internal predecessors, (7924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 7924 transitions. [2021-06-12 20:05:06,792 INFO L78 Accepts]: Start accepts. Automaton has 2805 states and 7924 transitions. Word has length 19 [2021-06-12 20:05:06,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:06,792 INFO L482 AbstractCegarLoop]: Abstraction has 2805 states and 7924 transitions. [2021-06-12 20:05:06,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:06,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2805 states and 7924 transitions. [2021-06-12 20:05:06,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:06,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:06,795 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:07,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4611,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:07,009 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:07,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:07,009 INFO L82 PathProgramCache]: Analyzing trace with hash -15106760, now seen corresponding path program 628 times [2021-06-12 20:05:07,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:07,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437457225] [2021-06-12 20:05:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:07,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:07,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437457225] [2021-06-12 20:05:07,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437457225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:07,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738588706] [2021-06-12 20:05:07,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:07,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:07,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:07,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:07,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:07,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:07,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:07,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:07,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:07,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:07,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:07,420 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:07,421 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:07,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:07,421 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:07,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738588706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:07,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:07,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:05:07,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116285892] [2021-06-12 20:05:07,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:05:07,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:07,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:05:07,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:07,483 INFO L87 Difference]: Start difference. First operand 2805 states and 7924 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:08,358 INFO L93 Difference]: Finished difference Result 3036 states and 8341 transitions. [2021-06-12 20:05:08,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:05:08,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:08,361 INFO L225 Difference]: With dead ends: 3036 [2021-06-12 20:05:08,361 INFO L226 Difference]: Without dead ends: 3036 [2021-06-12 20:05:08,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 768.9ms TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:05:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2021-06-12 20:05:08,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 2794. [2021-06-12 20:05:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 2.8234872896527032) internal successors, (7886), 2793 states have internal predecessors, (7886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 7886 transitions. [2021-06-12 20:05:08,390 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 7886 transitions. Word has length 19 [2021-06-12 20:05:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:08,390 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 7886 transitions. [2021-06-12 20:05:08,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 7886 transitions. [2021-06-12 20:05:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:08,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:08,392 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:08,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4618 [2021-06-12 20:05:08,593 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:08,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:08,593 INFO L82 PathProgramCache]: Analyzing trace with hash 786509468, now seen corresponding path program 629 times [2021-06-12 20:05:08,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:08,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429892361] [2021-06-12 20:05:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:08,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:08,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:08,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429892361] [2021-06-12 20:05:08,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429892361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:08,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058448813] [2021-06-12 20:05:08,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:08,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:08,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:08,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:08,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:08,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:08,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:08,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:08,953 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:08,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:08,956 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:08,987 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:08,988 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:08,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:08,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:09,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058448813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:09,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:09,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:05:09,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772482348] [2021-06-12 20:05:09,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:05:09,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:05:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:09,063 INFO L87 Difference]: Start difference. First operand 2794 states and 7886 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:10,150 INFO L93 Difference]: Finished difference Result 2976 states and 8218 transitions. [2021-06-12 20:05:10,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:05:10,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:10,154 INFO L225 Difference]: With dead ends: 2976 [2021-06-12 20:05:10,154 INFO L226 Difference]: Without dead ends: 2972 [2021-06-12 20:05:10,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 860.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:05:10,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-06-12 20:05:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2812. [2021-06-12 20:05:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 2.8278192813945213) internal successors, (7949), 2811 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 7949 transitions. [2021-06-12 20:05:10,183 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 7949 transitions. Word has length 19 [2021-06-12 20:05:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:10,183 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 7949 transitions. [2021-06-12 20:05:10,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 7949 transitions. [2021-06-12 20:05:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:10,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:10,185 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:10,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4622,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:10,386 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1790114122, now seen corresponding path program 630 times [2021-06-12 20:05:10,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:10,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87241231] [2021-06-12 20:05:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:10,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:10,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87241231] [2021-06-12 20:05:10,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87241231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:10,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488429874] [2021-06-12 20:05:10,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:10,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:10,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:10,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:10,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:10,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:10,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:10,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:10,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:10,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:10,741 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:10,773 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:10,773 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:10,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:10,774 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:10,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488429874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:10,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:10,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 20:05:10,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778254452] [2021-06-12 20:05:10,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:05:10,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:05:10,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:10,829 INFO L87 Difference]: Start difference. First operand 2812 states and 7949 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:11,320 INFO L93 Difference]: Finished difference Result 2951 states and 8180 transitions. [2021-06-12 20:05:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:05:11,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:11,324 INFO L225 Difference]: With dead ends: 2951 [2021-06-12 20:05:11,324 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 20:05:11,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:05:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 20:05:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2796. [2021-06-12 20:05:11,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 2.8257602862254023) internal successors, (7898), 2795 states have internal predecessors, (7898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 7898 transitions. [2021-06-12 20:05:11,351 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 7898 transitions. Word has length 19 [2021-06-12 20:05:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:11,351 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 7898 transitions. [2021-06-12 20:05:11,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:11,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 7898 transitions. [2021-06-12 20:05:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:11,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:11,354 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:11,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4628,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:11,554 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:11,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:11,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2035313566, now seen corresponding path program 631 times [2021-06-12 20:05:11,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:11,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590203105] [2021-06-12 20:05:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:05:11,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:11,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590203105] [2021-06-12 20:05:11,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590203105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:11,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447989794] [2021-06-12 20:05:11,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:11,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:11,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:11,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:11,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:11,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:11,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:11,839 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:11,871 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:11,871 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:11,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:11,872 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:11,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447989794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:11,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:11,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:11,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179720586] [2021-06-12 20:05:11,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:11,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:11,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:11,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:11,945 INFO L87 Difference]: Start difference. First operand 2796 states and 7898 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:12,780 INFO L93 Difference]: Finished difference Result 2925 states and 8183 transitions. [2021-06-12 20:05:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:05:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:12,783 INFO L225 Difference]: With dead ends: 2925 [2021-06-12 20:05:12,783 INFO L226 Difference]: Without dead ends: 2921 [2021-06-12 20:05:12,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 762.0ms TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:05:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-12 20:05:12,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2802. [2021-06-12 20:05:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 2.826490539093181) internal successors, (7917), 2801 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 7917 transitions. [2021-06-12 20:05:12,810 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 7917 transitions. Word has length 19 [2021-06-12 20:05:12,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:12,810 INFO L482 AbstractCegarLoop]: Abstraction has 2802 states and 7917 transitions. [2021-06-12 20:05:12,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:12,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 7917 transitions. [2021-06-12 20:05:12,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:12,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:12,813 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:13,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4632,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:13,018 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:13,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1684242850, now seen corresponding path program 632 times [2021-06-12 20:05:13,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:13,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604237813] [2021-06-12 20:05:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:13,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604237813] [2021-06-12 20:05:13,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604237813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:13,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599675115] [2021-06-12 20:05:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:13,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:13,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:13,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:13,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:13,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:13,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:13,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:13,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,335 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:05:13,335 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:13,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:13,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:05:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:13,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599675115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:13,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:13,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:13,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269152757] [2021-06-12 20:05:13,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:13,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:13,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:13,358 INFO L87 Difference]: Start difference. First operand 2802 states and 7917 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:13,697 INFO L93 Difference]: Finished difference Result 3062 states and 8466 transitions. [2021-06-12 20:05:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:05:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:13,700 INFO L225 Difference]: With dead ends: 3062 [2021-06-12 20:05:13,700 INFO L226 Difference]: Without dead ends: 3062 [2021-06-12 20:05:13,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:13,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3062 states. [2021-06-12 20:05:13,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3062 to 2839. [2021-06-12 20:05:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 2.831923890063425) internal successors, (8037), 2838 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 8037 transitions. [2021-06-12 20:05:13,728 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 8037 transitions. Word has length 19 [2021-06-12 20:05:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:13,728 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 8037 transitions. [2021-06-12 20:05:13,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 8037 transitions. [2021-06-12 20:05:13,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:13,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:13,731 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:13,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4637,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:13,931 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash -753360262, now seen corresponding path program 633 times [2021-06-12 20:05:13,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:13,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701586497] [2021-06-12 20:05:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:14,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:14,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701586497] [2021-06-12 20:05:14,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701586497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174597223] [2021-06-12 20:05:14,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:14,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:14,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:14,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:14,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:14,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:14,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:14,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:14,271 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:14,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:14,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:14,278 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:14,280 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:14,310 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:14,310 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:14,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:14,311 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:14,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174597223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:14,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:14,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:14,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734188768] [2021-06-12 20:05:14,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:14,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:14,340 INFO L87 Difference]: Start difference. First operand 2839 states and 8037 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:15,027 INFO L93 Difference]: Finished difference Result 2942 states and 8191 transitions. [2021-06-12 20:05:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:05:15,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:15,030 INFO L225 Difference]: With dead ends: 2942 [2021-06-12 20:05:15,030 INFO L226 Difference]: Without dead ends: 2934 [2021-06-12 20:05:15,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:05:15,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-12 20:05:15,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2844. [2021-06-12 20:05:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2843 states have (on average 2.8287020752725995) internal successors, (8042), 2843 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 8042 transitions. [2021-06-12 20:05:15,057 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 8042 transitions. Word has length 19 [2021-06-12 20:05:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:15,057 INFO L482 AbstractCegarLoop]: Abstraction has 2844 states and 8042 transitions. [2021-06-12 20:05:15,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 8042 transitions. [2021-06-12 20:05:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:15,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:15,059 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:15,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-06-12 20:05:15,260 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:15,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:15,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1449702332, now seen corresponding path program 634 times [2021-06-12 20:05:15,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:15,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136927166] [2021-06-12 20:05:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:15,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136927166] [2021-06-12 20:05:15,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136927166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657300499] [2021-06-12 20:05:15,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:15,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:15,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:15,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:15,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:15,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:15,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:15,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:15,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:15,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,580 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:05:15,580 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:15,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:15,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:05:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:15,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657300499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:15,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:15,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:15,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691661025] [2021-06-12 20:05:15,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:15,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:15,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:15,603 INFO L87 Difference]: Start difference. First operand 2844 states and 8042 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:16,786 INFO L93 Difference]: Finished difference Result 3189 states and 8726 transitions. [2021-06-12 20:05:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:05:16,786 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:16,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:16,789 INFO L225 Difference]: With dead ends: 3189 [2021-06-12 20:05:16,789 INFO L226 Difference]: Without dead ends: 3189 [2021-06-12 20:05:16,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 896.8ms TimeCoverageRelationStatistics Valid=256, Invalid=2000, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 20:05:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-06-12 20:05:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2847. [2021-06-12 20:05:16,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2847 states, 2846 states have (on average 2.8292340126493323) internal successors, (8052), 2846 states have internal predecessors, (8052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2847 states to 2847 states and 8052 transitions. [2021-06-12 20:05:16,819 INFO L78 Accepts]: Start accepts. Automaton has 2847 states and 8052 transitions. Word has length 19 [2021-06-12 20:05:16,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:16,820 INFO L482 AbstractCegarLoop]: Abstraction has 2847 states and 8052 transitions. [2021-06-12 20:05:16,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2847 states and 8052 transitions. [2021-06-12 20:05:16,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:16,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:16,822 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:17,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4647,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:17,023 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1291215840, now seen corresponding path program 635 times [2021-06-12 20:05:17,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:17,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105966474] [2021-06-12 20:05:17,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:17,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:17,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105966474] [2021-06-12 20:05:17,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105966474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:17,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773339734] [2021-06-12 20:05:17,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:17,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:17,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:17,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:17,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:17,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:17,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:17,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:17,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:17,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:17,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:17,392 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:17,426 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:17,426 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:17,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:17,427 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:17,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773339734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:17,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:17,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:17,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580750120] [2021-06-12 20:05:17,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:17,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:17,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:17,461 INFO L87 Difference]: Start difference. First operand 2847 states and 8052 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:18,174 INFO L93 Difference]: Finished difference Result 2960 states and 8221 transitions. [2021-06-12 20:05:18,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:05:18,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:18,178 INFO L225 Difference]: With dead ends: 2960 [2021-06-12 20:05:18,178 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 20:05:18,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 679.7ms TimeCoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:05:18,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 20:05:18,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2850. [2021-06-12 20:05:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2850 states, 2849 states have (on average 2.8273078273078274) internal successors, (8055), 2849 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2850 states to 2850 states and 8055 transitions. [2021-06-12 20:05:18,208 INFO L78 Accepts]: Start accepts. Automaton has 2850 states and 8055 transitions. Word has length 19 [2021-06-12 20:05:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:18,208 INFO L482 AbstractCegarLoop]: Abstraction has 2850 states and 8055 transitions. [2021-06-12 20:05:18,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2850 states and 8055 transitions. [2021-06-12 20:05:18,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:18,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:18,211 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:18,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4650 [2021-06-12 20:05:18,411 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1689344670, now seen corresponding path program 636 times [2021-06-12 20:05:18,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:18,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592458426] [2021-06-12 20:05:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:18,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:18,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592458426] [2021-06-12 20:05:18,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592458426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:18,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582438065] [2021-06-12 20:05:18,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:18,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:18,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:18,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:18,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:18,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:18,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:18,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:18,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,757 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:05:18,757 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:18,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:18,757 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:05:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:18,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582438065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:18,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:18,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:18,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290220527] [2021-06-12 20:05:18,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:18,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:18,779 INFO L87 Difference]: Start difference. First operand 2850 states and 8055 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:19,964 INFO L93 Difference]: Finished difference Result 3228 states and 8883 transitions. [2021-06-12 20:05:19,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:05:19,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:19,967 INFO L225 Difference]: With dead ends: 3228 [2021-06-12 20:05:19,967 INFO L226 Difference]: Without dead ends: 3228 [2021-06-12 20:05:19,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 850.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1767, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:05:19,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-06-12 20:05:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2877. [2021-06-12 20:05:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2876 states have (on average 2.8355354659248957) internal successors, (8155), 2876 states have internal predecessors, (8155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 8155 transitions. [2021-06-12 20:05:19,998 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 8155 transitions. Word has length 19 [2021-06-12 20:05:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:19,998 INFO L482 AbstractCegarLoop]: Abstraction has 2877 states and 8155 transitions. [2021-06-12 20:05:19,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 8155 transitions. [2021-06-12 20:05:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:20,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:20,001 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:20,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4657 [2021-06-12 20:05:20,218 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash 769643962, now seen corresponding path program 637 times [2021-06-12 20:05:20,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:20,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972642608] [2021-06-12 20:05:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:20,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972642608] [2021-06-12 20:05:20,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972642608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103273697] [2021-06-12 20:05:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:20,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:20,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:20,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:20,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:20,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:20,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:20,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:20,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:20,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:20,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:20,609 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:20,609 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:20,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:20,610 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:20,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103273697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:20,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:20,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:20,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149796343] [2021-06-12 20:05:20,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:20,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:20,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:20,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:20,639 INFO L87 Difference]: Start difference. First operand 2877 states and 8155 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:21,523 INFO L93 Difference]: Finished difference Result 2965 states and 8295 transitions. [2021-06-12 20:05:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:05:21,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:21,527 INFO L225 Difference]: With dead ends: 2965 [2021-06-12 20:05:21,527 INFO L226 Difference]: Without dead ends: 2959 [2021-06-12 20:05:21,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:05:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2959 states. [2021-06-12 20:05:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2959 to 2879. [2021-06-12 20:05:21,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.8342599027102153) internal successors, (8157), 2878 states have internal predecessors, (8157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 8157 transitions. [2021-06-12 20:05:21,558 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 8157 transitions. Word has length 19 [2021-06-12 20:05:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:21,558 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 8157 transitions. [2021-06-12 20:05:21,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 8157 transitions. [2021-06-12 20:05:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:21,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:21,561 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:21,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4660 [2021-06-12 20:05:21,777 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1697075068, now seen corresponding path program 638 times [2021-06-12 20:05:21,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:21,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597955829] [2021-06-12 20:05:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:21,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:21,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597955829] [2021-06-12 20:05:21,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597955829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:21,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280604952] [2021-06-12 20:05:21,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:21,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:21,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:21,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:22,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:22,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:22,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:22,151 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:22,182 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:22,182 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:22,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:22,183 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:22,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280604952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:22,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:22,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:22,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903583023] [2021-06-12 20:05:22,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:22,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:22,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:22,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:22,258 INFO L87 Difference]: Start difference. First operand 2879 states and 8157 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:23,334 INFO L93 Difference]: Finished difference Result 3161 states and 8677 transitions. [2021-06-12 20:05:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:05:23,335 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:23,338 INFO L225 Difference]: With dead ends: 3161 [2021-06-12 20:05:23,338 INFO L226 Difference]: Without dead ends: 3157 [2021-06-12 20:05:23,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 894.8ms TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:05:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-06-12 20:05:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2829. [2021-06-12 20:05:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2828 states have (on average 2.8246110325318248) internal successors, (7988), 2828 states have internal predecessors, (7988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 7988 transitions. [2021-06-12 20:05:23,371 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 7988 transitions. Word has length 19 [2021-06-12 20:05:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:23,371 INFO L482 AbstractCegarLoop]: Abstraction has 2829 states and 7988 transitions. [2021-06-12 20:05:23,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 7988 transitions. [2021-06-12 20:05:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:23,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:23,374 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:23,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4667 [2021-06-12 20:05:23,575 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:23,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:23,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1796276000, now seen corresponding path program 639 times [2021-06-12 20:05:23,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:23,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539068179] [2021-06-12 20:05:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:23,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:23,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539068179] [2021-06-12 20:05:23,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539068179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:23,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146739566] [2021-06-12 20:05:23,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:23,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:23,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:23,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 20:05:23,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:23,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:23,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:23,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:23,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:23,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:23,902 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:23,936 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:23,936 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:23,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:23,937 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:24,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146739566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:24,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:24,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:24,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839699152] [2021-06-12 20:05:24,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:24,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:24,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:24,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:24,013 INFO L87 Difference]: Start difference. First operand 2829 states and 7988 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:25,058 INFO L93 Difference]: Finished difference Result 2956 states and 8222 transitions. [2021-06-12 20:05:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:05:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:25,061 INFO L225 Difference]: With dead ends: 2956 [2021-06-12 20:05:25,061 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 20:05:25,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:05:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 20:05:25,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2831. [2021-06-12 20:05:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2831 states, 2830 states have (on average 2.824381625441696) internal successors, (7993), 2830 states have internal predecessors, (7993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2831 states to 2831 states and 7993 transitions. [2021-06-12 20:05:25,090 INFO L78 Accepts]: Start accepts. Automaton has 2831 states and 7993 transitions. Word has length 19 [2021-06-12 20:05:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:25,090 INFO L482 AbstractCegarLoop]: Abstraction has 2831 states and 7993 transitions. [2021-06-12 20:05:25,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2831 states and 7993 transitions. [2021-06-12 20:05:25,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:25,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:25,093 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:25,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4671 [2021-06-12 20:05:25,301 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -77932294, now seen corresponding path program 640 times [2021-06-12 20:05:25,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:25,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940089906] [2021-06-12 20:05:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:25,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:25,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940089906] [2021-06-12 20:05:25,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940089906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:25,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549216132] [2021-06-12 20:05:25,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:25,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:25,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:25,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:25,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:25,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:25,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:25,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:25,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:25,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:25,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:25,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:25,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:25,616 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:25,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:25,651 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:25,651 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:25,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:25,652 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:25,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549216132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:25,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:25,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-12 20:05:25,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486514150] [2021-06-12 20:05:25,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 20:05:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 20:05:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:05:25,711 INFO L87 Difference]: Start difference. First operand 2831 states and 7993 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:26,348 INFO L93 Difference]: Finished difference Result 2951 states and 8218 transitions. [2021-06-12 20:05:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:05:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:26,351 INFO L225 Difference]: With dead ends: 2951 [2021-06-12 20:05:26,351 INFO L226 Difference]: Without dead ends: 2951 [2021-06-12 20:05:26,352 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:05:26,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-12 20:05:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2810. [2021-06-12 20:05:26,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2810 states, 2809 states have (on average 2.8248487006051977) internal successors, (7935), 2809 states have internal predecessors, (7935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 7935 transitions. [2021-06-12 20:05:26,381 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 7935 transitions. Word has length 19 [2021-06-12 20:05:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:26,381 INFO L482 AbstractCegarLoop]: Abstraction has 2810 states and 7935 transitions. [2021-06-12 20:05:26,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 7935 transitions. [2021-06-12 20:05:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:26,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:26,384 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:26,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4677 [2021-06-12 20:05:26,600 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:26,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash -2084462630, now seen corresponding path program 641 times [2021-06-12 20:05:26,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:26,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94591693] [2021-06-12 20:05:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:05:26,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:26,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94591693] [2021-06-12 20:05:26,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94591693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:26,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180440668] [2021-06-12 20:05:26,684 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:26,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:05:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:26,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:26,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:26,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:26,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:26,884 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:26,886 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:26,930 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:26,930 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:26,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:26,931 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:27,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180440668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:27,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:27,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:27,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748617589] [2021-06-12 20:05:27,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:27,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:27,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:27,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:27,006 INFO L87 Difference]: Start difference. First operand 2810 states and 7935 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:27,779 INFO L93 Difference]: Finished difference Result 2858 states and 8036 transitions. [2021-06-12 20:05:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:05:27,779 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:27,782 INFO L225 Difference]: With dead ends: 2858 [2021-06-12 20:05:27,782 INFO L226 Difference]: Without dead ends: 2854 [2021-06-12 20:05:27,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 693.8ms TimeCoverageRelationStatistics Valid=164, Invalid=1168, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:05:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-12 20:05:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2803. [2021-06-12 20:05:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 2.8265524625267666) internal successors, (7920), 2802 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 7920 transitions. [2021-06-12 20:05:27,809 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 7920 transitions. Word has length 19 [2021-06-12 20:05:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:27,809 INFO L482 AbstractCegarLoop]: Abstraction has 2803 states and 7920 transitions. [2021-06-12 20:05:27,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 7920 transitions. [2021-06-12 20:05:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:27,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:27,811 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:28,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4681 [2021-06-12 20:05:28,017 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1643481336, now seen corresponding path program 642 times [2021-06-12 20:05:28,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:28,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092412046] [2021-06-12 20:05:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:28,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:28,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092412046] [2021-06-12 20:05:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092412046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976205074] [2021-06-12 20:05:28,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:28,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:05:28,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:28,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:28,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:28,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:28,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:28,746 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,769 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:05:28,770 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:28,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:28,770 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:05:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:28,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976205074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:28,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:28,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:28,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238621178] [2021-06-12 20:05:28,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:28,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:28,794 INFO L87 Difference]: Start difference. First operand 2803 states and 7920 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:29,256 INFO L93 Difference]: Finished difference Result 3049 states and 8463 transitions. [2021-06-12 20:05:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:05:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:29,260 INFO L225 Difference]: With dead ends: 3049 [2021-06-12 20:05:29,260 INFO L226 Difference]: Without dead ends: 3049 [2021-06-12 20:05:29,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:05:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-12 20:05:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2824. [2021-06-12 20:05:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 2.8274884874247252) internal successors, (7982), 2823 states have internal predecessors, (7982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 7982 transitions. [2021-06-12 20:05:29,292 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 7982 transitions. Word has length 19 [2021-06-12 20:05:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:29,292 INFO L482 AbstractCegarLoop]: Abstraction has 2824 states and 7982 transitions. [2021-06-12 20:05:29,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 7982 transitions. [2021-06-12 20:05:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:29,295 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:29,295 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:29,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4686,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:29,505 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1097436836, now seen corresponding path program 643 times [2021-06-12 20:05:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:29,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734042888] [2021-06-12 20:05:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:29,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:29,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734042888] [2021-06-12 20:05:29,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734042888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:29,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135939315] [2021-06-12 20:05:29,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:29,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:29,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:29,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:29,810 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:29,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:29,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:29,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:29,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:29,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:29,823 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:29,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:29,829 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:29,860 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:29,861 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:29,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:29,862 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:30,009 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 20:05:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:30,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135939315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:30,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:30,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242531637] [2021-06-12 20:05:30,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:30,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:30,031 INFO L87 Difference]: Start difference. First operand 2824 states and 7982 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:30,614 INFO L93 Difference]: Finished difference Result 2907 states and 8112 transitions. [2021-06-12 20:05:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:05:30,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:30,618 INFO L225 Difference]: With dead ends: 2907 [2021-06-12 20:05:30,618 INFO L226 Difference]: Without dead ends: 2901 [2021-06-12 20:05:30,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2021-06-12 20:05:30,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2824. [2021-06-12 20:05:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 2.8250088558271345) internal successors, (7975), 2823 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 7975 transitions. [2021-06-12 20:05:30,649 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 7975 transitions. Word has length 19 [2021-06-12 20:05:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:30,650 INFO L482 AbstractCegarLoop]: Abstraction has 2824 states and 7975 transitions. [2021-06-12 20:05:30,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 7975 transitions. [2021-06-12 20:05:30,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:30,652 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:30,652 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:30,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4689,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:30,853 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:30,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1883123674, now seen corresponding path program 644 times [2021-06-12 20:05:30,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:30,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685517865] [2021-06-12 20:05:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:30,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:30,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685517865] [2021-06-12 20:05:30,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685517865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:30,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440135156] [2021-06-12 20:05:30,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:30,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:30,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:30,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:31,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:31,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:31,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:31,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:31,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:31,155 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,176 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:05:31,177 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:31,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:31,177 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:05:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:31,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440135156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:31,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:31,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:31,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872705424] [2021-06-12 20:05:31,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:31,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:31,198 INFO L87 Difference]: Start difference. First operand 2824 states and 7975 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:31,861 INFO L93 Difference]: Finished difference Result 3040 states and 8407 transitions. [2021-06-12 20:05:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:05:31,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:31,865 INFO L225 Difference]: With dead ends: 3040 [2021-06-12 20:05:31,865 INFO L226 Difference]: Without dead ends: 3038 [2021-06-12 20:05:31,865 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 530.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:05:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2021-06-12 20:05:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 2824. [2021-06-12 20:05:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 2.824300389656394) internal successors, (7973), 2823 states have internal predecessors, (7973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 7973 transitions. [2021-06-12 20:05:31,914 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 7973 transitions. Word has length 19 [2021-06-12 20:05:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:31,914 INFO L482 AbstractCegarLoop]: Abstraction has 2824 states and 7973 transitions. [2021-06-12 20:05:31,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 7973 transitions. [2021-06-12 20:05:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:31,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:31,917 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:32,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4696,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:32,117 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash 963422966, now seen corresponding path program 645 times [2021-06-12 20:05:32,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:32,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509981409] [2021-06-12 20:05:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:32,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:32,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509981409] [2021-06-12 20:05:32,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509981409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092806415] [2021-06-12 20:05:32,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:32,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:05:32,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:32,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:32,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:32,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:32,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:32,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:32,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:32,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:32,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:32,454 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:32,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:32,459 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:32,488 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:32,488 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:32,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:32,489 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:32,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092806415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:32,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:32,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:32,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104228442] [2021-06-12 20:05:32,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:32,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:32,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:32,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:32,517 INFO L87 Difference]: Start difference. First operand 2824 states and 7973 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:33,170 INFO L93 Difference]: Finished difference Result 2906 states and 8111 transitions. [2021-06-12 20:05:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:05:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:33,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:33,174 INFO L225 Difference]: With dead ends: 2906 [2021-06-12 20:05:33,174 INFO L226 Difference]: Without dead ends: 2902 [2021-06-12 20:05:33,174 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:05:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2902 states. [2021-06-12 20:05:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2902 to 2827. [2021-06-12 20:05:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.8227176220806793) internal successors, (7977), 2826 states have internal predecessors, (7977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 7977 transitions. [2021-06-12 20:05:33,203 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 7977 transitions. Word has length 19 [2021-06-12 20:05:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:33,203 INFO L482 AbstractCegarLoop]: Abstraction has 2827 states and 7977 transitions. [2021-06-12 20:05:33,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 7977 transitions. [2021-06-12 20:05:33,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:33,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:33,206 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:33,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4699,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:33,422 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1890854072, now seen corresponding path program 646 times [2021-06-12 20:05:33,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:33,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946538039] [2021-06-12 20:05:33,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:33,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946538039] [2021-06-12 20:05:33,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946538039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810684528] [2021-06-12 20:05:33,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:33,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:33,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:33,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:33,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:33,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:33,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:33,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:33,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:33,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:33,725 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:33,725 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:33,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:33,726 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:33,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810684528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:33,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:33,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:33,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314878904] [2021-06-12 20:05:33,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:33,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:33,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:33,778 INFO L87 Difference]: Start difference. First operand 2827 states and 7977 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:34,402 INFO L93 Difference]: Finished difference Result 3035 states and 8345 transitions. [2021-06-12 20:05:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:05:34,402 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:34,405 INFO L225 Difference]: With dead ends: 3035 [2021-06-12 20:05:34,405 INFO L226 Difference]: Without dead ends: 3032 [2021-06-12 20:05:34,405 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 556.5ms TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-06-12 20:05:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2818. [2021-06-12 20:05:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2817 states have (on average 2.8217962371317005) internal successors, (7949), 2817 states have internal predecessors, (7949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 7949 transitions. [2021-06-12 20:05:34,435 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 7949 transitions. Word has length 19 [2021-06-12 20:05:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:34,435 INFO L482 AbstractCegarLoop]: Abstraction has 2818 states and 7949 transitions. [2021-06-12 20:05:34,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:34,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 7949 transitions. [2021-06-12 20:05:34,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:34,438 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:34,438 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:34,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4706 [2021-06-12 20:05:34,649 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:34,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:34,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1602496996, now seen corresponding path program 647 times [2021-06-12 20:05:34,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:34,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294404485] [2021-06-12 20:05:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:34,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:34,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294404485] [2021-06-12 20:05:34,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294404485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:34,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539761645] [2021-06-12 20:05:34,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:34,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:05:34,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:34,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:34,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:34,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:34,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:34,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:34,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:34,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:34,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:34,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:34,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:34,937 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:34,968 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:34,969 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:34,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:34,969 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:35,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539761645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:35,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:35,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:35,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644779440] [2021-06-12 20:05:35,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:35,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:35,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:35,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:35,074 INFO L87 Difference]: Start difference. First operand 2818 states and 7949 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,075 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-06-12 20:05:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:36,330 INFO L93 Difference]: Finished difference Result 2964 states and 8231 transitions. [2021-06-12 20:05:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 20:05:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:36,334 INFO L225 Difference]: With dead ends: 2964 [2021-06-12 20:05:36,334 INFO L226 Difference]: Without dead ends: 2960 [2021-06-12 20:05:36,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1168.4ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:05:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2021-06-12 20:05:36,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2827. [2021-06-12 20:05:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2826 states have (on average 2.822009907997169) internal successors, (7975), 2826 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 7975 transitions. [2021-06-12 20:05:36,364 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 7975 transitions. Word has length 19 [2021-06-12 20:05:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:36,364 INFO L482 AbstractCegarLoop]: Abstraction has 2827 states and 7975 transitions. [2021-06-12 20:05:36,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 7975 transitions. [2021-06-12 20:05:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:36,367 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:36,367 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:36,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4710 [2021-06-12 20:05:36,588 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:36,588 INFO L82 PathProgramCache]: Analyzing trace with hash 115846710, now seen corresponding path program 648 times [2021-06-12 20:05:36,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:36,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815202559] [2021-06-12 20:05:36,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:36,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:36,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815202559] [2021-06-12 20:05:36,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815202559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:36,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592517376] [2021-06-12 20:05:36,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:36,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:05:36,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:36,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:36,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:36,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:36,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:36,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:36,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:36,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:36,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:36,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:36,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:36,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:36,987 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:36,987 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:36,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:36,988 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:37,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592517376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:37,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:37,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394185162] [2021-06-12 20:05:37,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:37,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:37,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:37,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:37,044 INFO L87 Difference]: Start difference. First operand 2827 states and 7975 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:37,613 INFO L93 Difference]: Finished difference Result 2962 states and 8232 transitions. [2021-06-12 20:05:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:05:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:37,616 INFO L225 Difference]: With dead ends: 2962 [2021-06-12 20:05:37,616 INFO L226 Difference]: Without dead ends: 2962 [2021-06-12 20:05:37,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 644.5ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:05:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2021-06-12 20:05:37,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2808. [2021-06-12 20:05:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2808 states, 2807 states have (on average 2.8204488778054864) internal successors, (7917), 2807 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 7917 transitions. [2021-06-12 20:05:37,646 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 7917 transitions. Word has length 19 [2021-06-12 20:05:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:37,646 INFO L482 AbstractCegarLoop]: Abstraction has 2808 states and 7917 transitions. [2021-06-12 20:05:37,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 7917 transitions. [2021-06-12 20:05:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:37,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:37,649 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:37,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4716,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:37,857 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash 276493342, now seen corresponding path program 649 times [2021-06-12 20:05:37,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:37,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609359507] [2021-06-12 20:05:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:05:37,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609359507] [2021-06-12 20:05:37,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609359507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:37,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353706552] [2021-06-12 20:05:37,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:37,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:37,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:38,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:38,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:38,119 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:38,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:38,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:38,158 INFO L628 ElimStorePlain]: treesize reduction 49, result has 35.5 percent of original size [2021-06-12 20:05:38,158 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:38,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 20:05:38,158 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:113, output treesize:27 [2021-06-12 20:05:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:38,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353706552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:38,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:38,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-12 20:05:38,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524324891] [2021-06-12 20:05:38,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:05:38,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:05:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:05:38,231 INFO L87 Difference]: Start difference. First operand 2808 states and 7917 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:38,810 INFO L93 Difference]: Finished difference Result 2866 states and 8032 transitions. [2021-06-12 20:05:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:05:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:38,813 INFO L225 Difference]: With dead ends: 2866 [2021-06-12 20:05:38,814 INFO L226 Difference]: Without dead ends: 2862 [2021-06-12 20:05:38,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 583.0ms TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:05:38,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2021-06-12 20:05:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2806. [2021-06-12 20:05:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 2.819964349376114) internal successors, (7910), 2805 states have internal predecessors, (7910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 7910 transitions. [2021-06-12 20:05:38,844 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 7910 transitions. Word has length 19 [2021-06-12 20:05:38,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:38,844 INFO L482 AbstractCegarLoop]: Abstraction has 2806 states and 7910 transitions. [2021-06-12 20:05:38,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 7910 transitions. [2021-06-12 20:05:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:38,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:38,847 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:39,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:39,063 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:39,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:39,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1989950690, now seen corresponding path program 650 times [2021-06-12 20:05:39,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:39,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330616316] [2021-06-12 20:05:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:39,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:39,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:39,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330616316] [2021-06-12 20:05:39,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330616316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811187800] [2021-06-12 20:05:39,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:39,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:05:39,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:39,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-12 20:05:39,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:39,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,386 INFO L628 ElimStorePlain]: treesize reduction 33, result has 35.3 percent of original size [2021-06-12 20:05:39,387 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:39,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:05:39,387 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:12 [2021-06-12 20:05:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:39,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811187800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:39,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:39,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:39,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218174924] [2021-06-12 20:05:39,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:39,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:39,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:39,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:39,408 INFO L87 Difference]: Start difference. First operand 2806 states and 7910 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:39,953 INFO L93 Difference]: Finished difference Result 2995 states and 8299 transitions. [2021-06-12 20:05:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:05:39,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:39,956 INFO L225 Difference]: With dead ends: 2995 [2021-06-12 20:05:39,956 INFO L226 Difference]: Without dead ends: 2995 [2021-06-12 20:05:39,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:05:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-06-12 20:05:39,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 2806. [2021-06-12 20:05:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 2.819964349376114) internal successors, (7910), 2805 states have internal predecessors, (7910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 7910 transitions. [2021-06-12 20:05:39,988 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 7910 transitions. Word has length 19 [2021-06-12 20:05:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:39,988 INFO L482 AbstractCegarLoop]: Abstraction has 2806 states and 7910 transitions. [2021-06-12 20:05:39,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 7910 transitions. [2021-06-12 20:05:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:39,991 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:39,991 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:40,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4725,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:40,201 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1385315898, now seen corresponding path program 651 times [2021-06-12 20:05:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:40,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847310032] [2021-06-12 20:05:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:40,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:40,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847310032] [2021-06-12 20:05:40,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847310032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868128822] [2021-06-12 20:05:40,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:40,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:05:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:40,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:40,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:40,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:40,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:40,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:40,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:40,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-12 20:05:40,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:40,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:05:40,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 20:05:40,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-12 20:05:40,515 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-12 20:05:40,518 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 20:05:40,547 INFO L628 ElimStorePlain]: treesize reduction 40, result has 39.4 percent of original size [2021-06-12 20:05:40,547 INFO L518 ElimStorePlain]: Eliminatee array_2 vanished before elimination [2021-06-12 20:05:40,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 20:05:40,548 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:119, output treesize:20 [2021-06-12 20:05:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:40,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868128822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:40,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:05:40,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-12 20:05:40,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814430461] [2021-06-12 20:05:40,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:05:40,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:05:40,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:05:40,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:05:40,576 INFO L87 Difference]: Start difference. First operand 2806 states and 7910 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:41,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:05:41,206 INFO L93 Difference]: Finished difference Result 2887 states and 8052 transitions. [2021-06-12 20:05:41,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:05:41,207 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-12 20:05:41,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:05:41,210 INFO L225 Difference]: With dead ends: 2887 [2021-06-12 20:05:41,210 INFO L226 Difference]: Without dead ends: 2883 [2021-06-12 20:05:41,210 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:05:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2021-06-12 20:05:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2806. [2021-06-12 20:05:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 2.815686274509804) internal successors, (7898), 2805 states have internal predecessors, (7898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 7898 transitions. [2021-06-12 20:05:41,239 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 7898 transitions. Word has length 19 [2021-06-12 20:05:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:05:41,240 INFO L482 AbstractCegarLoop]: Abstraction has 2806 states and 7898 transitions. [2021-06-12 20:05:41,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:05:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 7898 transitions. [2021-06-12 20:05:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-12 20:05:41,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:05:41,242 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:05:41,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4728 [2021-06-12 20:05:41,443 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:05:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:05:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1982220292, now seen corresponding path program 652 times [2021-06-12 20:05:41,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:05:41,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217205973] [2021-06-12 20:05:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:05:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:05:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:05:41,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:05:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217205973] [2021-06-12 20:05:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217205973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:05:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66451181] [2021-06-12 20:05:41,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Received shutdown request... Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:05:41,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:05:41,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:05:41,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 20:05:41,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:05:41,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4735 [2021-06-12 20:05:41,776 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:05:41,777 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:05:41,779 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:05:41,779 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:05:41 BasicIcfg [2021-06-12 20:05:41,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:05:41,779 INFO L168 Benchmark]: Toolchain (without parser) took 901330.83 ms. Allocated memory was 195.0 MB in the beginning and 874.5 MB in the end (delta: 679.5 MB). Free memory was 174.3 MB in the beginning and 403.0 MB in the end (delta: -228.7 MB). Peak memory consumption was 451.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:41,779 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:05:41,779 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.01 ms. Allocated memory is still 195.0 MB. Free memory was 174.1 MB in the beginning and 172.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:41,779 INFO L168 Benchmark]: Boogie Preprocessor took 29.51 ms. Allocated memory is still 195.0 MB. Free memory was 172.6 MB in the beginning and 171.7 MB in the end (delta: 906.8 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:05:41,779 INFO L168 Benchmark]: RCFGBuilder took 348.47 ms. Allocated memory is still 195.0 MB. Free memory was 171.6 MB in the beginning and 154.6 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:41,779 INFO L168 Benchmark]: TraceAbstraction took 900924.33 ms. Allocated memory was 195.0 MB in the beginning and 874.5 MB in the end (delta: 679.5 MB). Free memory was 154.2 MB in the beginning and 403.0 MB in the end (delta: -248.8 MB). Peak memory consumption was 431.9 MB. Max. memory is 8.0 GB. [2021-06-12 20:05:41,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 175.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.01 ms. Allocated memory is still 195.0 MB. Free memory was 174.1 MB in the beginning and 172.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.51 ms. Allocated memory is still 195.0 MB. Free memory was 172.6 MB in the beginning and 171.7 MB in the end (delta: 906.8 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 348.47 ms. Allocated memory is still 195.0 MB. Free memory was 171.6 MB in the beginning and 154.6 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 900924.33 ms. Allocated memory was 195.0 MB in the beginning and 874.5 MB in the end (delta: 679.5 MB). Free memory was 154.2 MB in the beginning and 403.0 MB in the end (delta: -248.8 MB). Peak memory consumption was 431.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 11 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 900847.6ms, OverallIterations: 666, TraceHistogramMax: 5, EmptinessCheckTime: 788.3ms, AutomataDifference: 452396.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20656 SDtfs, 43318 SDslu, 177763 SDs, 0 SdLazy, 388783 SolverSat, 11247 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 157869.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26834 GetRequests, 6775 SyntacticMatches, 725 SemanticMatches, 19334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148032 ImplicationChecksByTransitivity, 450376.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2879occurred in iteration=651, InterpolantAutomatonStates: 17063, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 9334.6ms AutomataMinimizationTime, 665 MinimizatonAttempts, 114719 StatesRemovedByMinimization, 665 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2541.1ms SsaConstructionTime, 8920.9ms SatisfiabilityAnalysisTime, 278713.0ms InterpolantComputationTime, 22724 NumberOfCodeBlocks, 22724 NumberOfCodeBlocksAsserted, 2344 NumberOfCheckSat, 21404 ConstructedInterpolants, 680 QuantifiedInterpolants, 308770 SizeOfPredicates, 4196 NumberOfNonLiveVariables, 56404 ConjunctsInSsa, 17791 ConjunctsInUnsatCore, 1320 InterpolantComputations, 10 PerfectInterpolantSequences, 3283/23462 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown